Fair enough, definitely true. But I would say after the events at the temple to the ending (and technically Inqi never sees the epilogue). I also agree that the Chant is not the be-all and end-all - but the Chant IS the only view of the Maker provided culturally so far.
The Maker is only ever packaged as Andrastian - Orlesian, or Tevine. Both varieties of Andrastian..ism (god that's long I'm calling it Andism now).... are monotheist. Even other countries that do not practice Andism as commonly, such as Rivain, still view the Maker in the same way Orlesian Andists do because the Exalted Marches bringing Andraste's word is how they learned about the Maker in the first place.
There may be parallels between the different religions that indicate the possibility the names are referring to the same guy (Like Yahweh and Allah, or Muhammed and Jesus do IRL).
Wouldn't need to make room for the Maker then, because he's already there.
I'd be inclined to thing that a Maker does exists, but not as Andists know him. However, the Dalish are so separate from human culture and philosophy they wouldn't recognise him. Certainly not while they still see their... godkings?... as actual gods. Until that view falls, and then it becomes a another case of 'well where's the real omnipotence then'.
As such I never play the Dalish as Andian, and have them merely 'meh maybe, idk n idc' about the Maker at best.
Moot point I suppose, since the Maker is supposed to never be confirmed one way or the other.