What is the Maker now?

Yes, I think that about sums it up...

The fact remains that every single religion in Thedas got it wrong by more than a few light years off.

The notion that the original spirits had to come from somewhere has nice parallels with RL religious conundrums: if they had to come from somewhere, doesn't this then apply to the Maker (God)? Where does the Maker come from? Or, if you'd rather have the scientific version, where do the laws of physics (that make {the creation} of the universe possible) come from?

This is not something that will be answered, if they have any sense at Bioware for these things (which these days is a big if I admit). The Maker is a figure akin to the gods of RL religions for a reason. Demythologizing such figures will adversely affect the identity of the setting.

You're right there, I stand corrected. And, as phoray pointed out, the same might be said for the dwarves.

I must admit I have always felt the juxtaposition between both Andrastian Chantries and the Elven religion to be the main religious narrative in Thedas. That and the contrast between the position held by the chantries and Corypheus' statement that he found the throne empty. Those religions were all wrong and it poses the interesting question of who it was, then, that spoke to Andraste after she shed her thirteenth tear in Maferath's vial...

According to Morrigan, Andraste was another host for Mythal. She says it rather quickly as kind of an afterthought so it's easy to miss, especially the first time through the game.

They should not answer this question.

Does maker exist? does it matter?

What is clear is that the first blight isn't about the Maker at all, it's a revisionist chant, that's a fact now.

But the story about Andraste and the Maker has not been touched by the game/stories at all.

Presumably the Maker is a giant elf, given how elves are now responsible for everything else in this setting.

:|

I do remember reading a codex that worship of the maker predates humans entering Thedas though it was a fairly minor religion when they arrived. One of the questions then becomes how much the modern religion matches what it was before entering Thedas, I'm sure there probably was a lot of cross contamination going on especially after Andraste.

There might be some of that, but I think it's more related to the place we visit.

Treviso: the Chantry staff looks to have left when the Antaam took over. We do get to visit the empty Chantry.

Rivain: never been much Andrastian, the Seers has always been their main spiritual guides. We also do not visit any cities, but it has the only "Chantry" related side quest in-game.

Minrathous: the interior of the Chantry in Dock Town looks like this the 1st time you get there in-game. And since DAO we meet Tevene who still worship the Old Gods over the Maker, so their Andrastianism might have always been more perfunctory then the zealotery of the South.
Nevarra: Cassandra complains about them just paying lip service to the Maker in DAI. But we only get to visit the Grand Necropolis too and the Mourn Watchers are way more academic focused.

Anderfels: no Chantry in Lavendel, the mementos are all mostly related to Andrastianism thought.