If DAO were to be remade using Frostbite, what changes would you like to see in the game?

Excellent writing. As one who has dabbled into old UE and some older engines, doing work in gaming industry I just also wanted to say the things "feeling simple, why dont they do it" are not usually that simple things to do.. especially transitioning from engine to engine might take a long long time to achieve parity what was built on top of previous one.

Also it seems for every new part of the game series needs to have different UI, I understand this also but.. ah well as I said things are not so simple as they look outside when rageing

I will be in the same camp.  A voiced warden like a voiced Revan and Jedi Exile is weird as hell.

The Warden's dialogue is totally unsuitable for a word for word voiced performance. It's just too short and direct most of the time, and the way dialogue progresses can be quite awkward when you're selecting the same sentence over and over again when you want to backtrack and explore a different discussion in that same instance. A lot of that awkwardness is obscured behind the protag's silence, and it's best just left that way.

Fix the memory bleed issue. By the time I get to the Battle of Denerim, the game is chugging like it blew an ignition coil. I also wouldn't say no to restoring the cut origin stories.

"IF DAO WERE TO BE REMADE USING FROSTBITE, WHAT CHANGES WOULD YOU LIKE TO SEE IN THE GAME?"

Well, the first change would be not remaking it in the Frostbite engine.
Yes, it makes beautiful environments, but that's all it was really made for.

If the admissions from the teams are any indication, they had to build everything else from scratch.
Leveling, skills, dialogue, choices, companions, combat...
All of that they had to basically reinvent the wheel.

It's not that Frostbite is a bad engine, it's that it's a rigid one.
Using Frostbite for Inquisition and Andromeda was basically the teams trying to take a train engine and retrofit it for off-road.
A train is designed to be used on tracks, a linear path.

I am impressed that they were able to make it work as well as they did, but the problem is that it didn't always work.

I find it telling that my favorite moments in those games were in places where it was more-or-less on rails, because it was able to play to the engine's strengths, or at least minimize its weaknesses.

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Perhaps I'm mistaken. I'm not a programmer, but every one I've talked to about this tells me the above common threads, so I'm going to take that as more probable than not.

I think if it's really that simple, then the changes I'd like to see are the pacing of combat.
Origins' combat works, but I like DA2 and Inquisition's better.

I'd also like to see auto-leveling of companions when you recruit them to be removed. Keep the option in the player's hands.

Other than that, I don't think there's much that really needs improving.
All the stuff I can think of has more to do with RL stuff that I have no say in, so I have no reason to talk about it.

I'd want a lot of the dialogue options taken out. NPCs are more like vending machines, spewing lore at you with a game of 50 questions, most of which end up being superfluous. Pretty sure Alistair told me the Archdemon was a dragon 5 times before the party camp scene where the Warden is shocked to dicover the Archdemon is...A DRAGON! 111!!!1

The game would just flow so much better if 3/4 of the dialogue options were removed entirely.

But other than that, I'd just want a few other things, designs and aethetics reworks to be more congruent with the rest of the series, the design of the elves and Elven/Dalish armours, Templars etc as well as making all the bug fixing mods a part of the base game.

We're obviously dealing with a never-ever-not-in-a-million-years scenario here, but: Better structured dialogue trees. I can take or leave the dialogue wheel of the later games, but actually knowing which option advances the conversation and which is for enquiries is extremely convenient.

I wouldn't mind a voiced Warden, in theory, though the dialogue would then require an even larger overhaul and the costs would obviously be astronomical. I do reckon that turning the voice off would be a thing regardless.

Official-ish modding support would be nice, in whatever capacity, but Frosty scratches that itch well enough.

Now, some points against. (Other than nostalgia, which is always a factor.)

Huge maps à la DA:I. There, they've turned what would otherwise be a tight narrative into some sort of simulator for aimlessly strolling about. Real life does a good enough job of that; the franchise certainly doesn't need it.

Animations. They're doing motion capture for DA4, and I sincerely hope that will extend to basic walking. And posture. In just about every cutscene in DA:I, any Inquisitor who's not a male human looks ready to run off and join a clan of enterprising gorillas. Can't exactly blame them for wanting to leave it all behind, but it does take away from the "accidental fantasy Jesus" experience. I've no idea why animations have turned out so much worse in Frostbite, as a whole lot of them are recycled anyway.

Dunno about Frosty...

bUt I wAnT mY sEr CaUtHrIeN rOmAnCe.

Hey, 1st: no kink shaming

And secondly, there's a way to not kill her. Unless your canon story is to always kill her twice for 2 Summer Swords

I'd just want it to look as pretty as DAI does. I just finished a playthrough of DAI and started a playthrough of DA2 and I can't get over how ugly it and DAO look in comparison.

And maybe speed up combat as a mage just a tiny bit.

Well, I finished the base game yesterday, and considering the game was chugging... (technically, it is my PC, the game just has no idea what to do with an R7 5800 and a 3070)

I would optimization for our current-day PCs. Give it prettier graphics.

Don't you DARE touch the story, the characters and the gameplay!

I'm currently playing DAO. I would change the sibling to a female if playing as a male noble. The sister is married with a child about to go off to fight for the king while hubby sticks around. At the end, the sister is seen talking to her brother who stopped the blight.