Things you wish would've happened in the trilogy

I'm still stunned they never had a stowaway geth storyline on the Nexus. A single form like Legion that was protecting a server containing backups of the geth or something. Saying that, it might turn out that the geth are on the quarian ark, I'm hoping so. At least in the novel they'd be there.

And I agree, there isn't much reason for them to upgrade, at least very few that make sense in their strange, very alien culture that the Reaper upgrades kind of nullify. If I ever get any good at dialogue modding, I may have to introduce a "Don't upgrade" dialogue path to peace, with the consequences of weaker geth assistance. We'll see (doubtful though!)

Doesn't Legion also say that one reason why the geth turned to the reapers was because so many of them were killed at once in the quarian's first attack and that loss of processing power/intelligence/consciousness/whatever (still not quite clear on how that distributed processing is supposed to work exactly) made them fall back to some sort of instinctual level? There may have been less of a thought process in allying with the reapers then a desperate clawing for the very last straw at that moment.

I thought that's why the turned to them in the events of ME3, because the quarians were stupidly attacking them when they thought they had the upper hand. 

Why did ~1/2 of the geth side with Saren and Sovereign in ME1?  It doesn't make sense given that we KNOW the geth allowed the quarians to escape 300 years ago.  They could have eradicated them but didn't.  What could have changed to turn them against all organics?  We know the answer to that, too.  Sovereign had some kind of influence over them.  It's not the same as indoctrination or else all of the geth would have joined.  From what we learned in ME2, Sovereign made 2+2=5 for some geth, so maybe that is a form of indoctrination.  We do know that equation can be "fixed" but the believe was that they could be corrupted again.  So, in ME3, we could have that are either at half strength or are susceptible to alteration of the equation, two things which might make them want to side with the Reapers.

If they put Daft Punk into the clubs this game would've been lit!!!!

Well this video points out some good points if BW want to reboot ME3 to fix. The guy maybe a nitpicker, but he says some valid points that needed to be addressed.

EA should have forked out the cash to whatever label owns Blue Oyster Cult's "Don't Fear The Reaper" to play over the final ME3 credits.

Or, a bouncy, silly muzak style rendition of it should have played in elevators.

I'm always in two minds about things like that. On the one hand I like seeing all the things I missed and realising why that odd thing was bothering me, but on the other hand once I know I can never un-know...if you know what I mean.
It can end up ruining the fun entirely. Sometimes ignorance is bliss.

For example I've been watching 3 Youtubers play Detroit: Become Human. Watching the first one I'm thinking 'oh the story is okay', then the last one ripped it to shreds and I'm like 'how did I not see how shit this is???'.

Oh yeah, I'm all for constructive criticism.  It's so important for developers to listen to it, and I feel like BioWare has in the past.  Many of the flaws in DAO were dealt with in DA2, then the flaws in DA2 addressed in DAI, so if they were to ever remake the trilogy I'm sure they'd listen again.

It's just a personal thing for me.  Once I hear someone call something out I wonder how I never realised, then can't help but notice it every time I play after that.  There are some games where I need to be in a state of blissful ignorance to enjoy them I think.

Games are just like theatre in a way. It is smokes and mirrors to suggest a world to play in. In reality it's math and tape trying to keep it together.