Hmmm... I'm starting to get the sneaking suspicion Fen'Harel/Solas might not be a god in the way Mythal, Elgar'nan, Dirthamen and cie are. I have very few clues that tell me this, but there's a few evidence there:
- He has a foci. An artefact said to channel the power of a god. Why would a god need a foci to channel his own power? If it was to channel someone else's power though...
- He (as far as we can tell) went into uthenera the way ancient elves would. He was powerful enough not to need substance, but woke up so weak he couldn't use his own foci.
- On the other hand, Mythal even as a wisp is quite powerful. Powerful enough to transform her own human vessel into a dragon at will (no one else, apart from Morrigan if she drinks from th well, can do so).
- We have found temples to other gods across Thedas, and yet apart from that small shrine to Fen'Harel (which doesn't seem that old), there are no hint that Fen'Harel was ever worshipped. On the other hand, we have he wolf statues, the wolf serving as some sort of protector to the elf. That same statue is in the temple of another god, Mythal, which everyone finds strange.
Now, I might be tally wrong there, but here's what I think. Solas isn't a god. He never was (although he IS an ancient elvhen, and a quite powerful one at that). One of the themes of DA;I seem to be how history distorts the truth and will make demi-gods of ordinary people. The Herald is the perfect example of that. So, I think he didn't lie. He was born in that small village and spent his youth exploring the fade. Possibly, there he caught the eye of one of the deities (quite possibly Mythal), the same way Gilal'nain is said to have, and brought into the inner circle. I like the idea that he might have become the protector of the pantheon. In short, he wasn't that dissimilar to Abelas. He was given the foci to help him in his task. But at one point, something changed and from protector he became their betrayer. Maybe that was due to Mythal's murder or Andruil's madness or a combination of things. Then he went to sleep. History became blurred in time and he was remembered as a god himself while he never was.
Anyway, I might be totally wrong there, but I think it would fit.