As for "they weren't gods", like I said before, and as he apparently said if that's the whole dialogue from the game, what one person considers a god isn't the same as another all the time. To him they might not be gods. Doesn't make that true.
Sure, I could pick up a random stick and tie a turnip to the top and call it a god. But Solas knows better than anybody else what exactly the elven "gods" were. And he obviously doesn't think of them as such. Is a powerful being suddenly a god simply by virtue of their power? What is a god? He seems to have thought of them as powerful, and very flawed, individuals, and he himself fits into that category.
I think the best bit of foreshadowing of what Solas truly is is the Inquisitor themselves. People are already beginning to worship them as divine, even though they're just an ordinary person who is able to do extraordinary things. A thousand years from now, who's to say that stories of the Inquisitor won't make them seem just as godly as tales of Fen'harel?
To be honest? For me personally that is more compelling because it gives you so much freedom. If a "god" is not bound to a physical entity but an immortal soul then there is so much... eternity. It can always shape, always change, it can be everywhere, all around you wherever you are. If a god is bound to a body it is so limited. Limited to places and time and limited to eyes and a nose and hand and feet. It is just not as divine and as omnipresent as it can be it is rather an essence. I see you prefer god Fen'Harel to be more like a person who can be touched and who can be there exclusively for somebody. But that's just what I do not like about it. How much it takes away.
When we speak of god we do not actually picture him as a person. That's what we tell children to give them something to understand. But it's more like he is everywhere, in all things. We do not take pieces of him or wear him out. He does not have to walk and carry a backpack. He so something untouchable, hence superior to everything else on Earth. At least that is the idea I have in mind and this idea I carry over to the elven gods. Hence, in my understanding, only one thing matters which is the soul and that is immortal. Seeing a god in front of me, standing there in a common body in whatever clothes I decide to put on him... actually, that would diminish the meaning of "god" and pull it down on another level, much more ordinary and common.
And that's why I don't think Solas, or any of the elven pantheon, were gods. You're using the whole, "omniscient, omnipotent, omnipresent (possibly omnibenevolent)" definition that most monotheistic religions go with. That's the same definition that believers in the Maker seem to be sticking with as well. But the Creators are much more in the mold of Polytheistic religions, where the gods are often personifications of creative forces. And by personifications, I mean people. Flawed, powerful, and often horrible people. Would you say that's a god? I wouldn't. And Solas is very obviously a person, with all of the flaws and contradictions that come with that. The wonderful thing about Solas is that he makes mistakes. A lot of mistakes. And has regrets. Gods aren't allowed to make mistakes. It undermines their godliness. Ultimately, I think Solas is like the Inquisitor. Someone who stepped up to do something that needed to be done, and was vilified by history for it. He's not a god. Just someone who had more power than most other people.