As someone who normally plays a Seldarine Drow, if he can't stay in the sun and we can't fix anything whatsoever about that (why not Larian?), then we go live in the Arcane Tower. Spend a bit of money (of which I seem to have plenty) fixing the roof, the one missing bit of floor and the lighting, got a nice garden there, a few lights around the garden and interior that aren't blue tinged (or can be - choice) would make it feel quite homey etc . Remove the elevator and put in a spiral staircase so that anyone can move between levels. Can bring Scratch and the Owlbear and even Yenna and her cat, plenty of room there. Guest room for any of the others to pop in. Bernard thinks we belong there, place is protected so why not? And thats just a miniscule corner of the Underdark, so much we could go and see as a couple. Can always pop back to the above world at nighttime for some tavern life etc its not difficult to get to portal back to the underdark at sunrise.
Really all we need are some better choices, not necessarily what I have described above of course, but choices - that's what the spawn ending is missing.
That and being able to hug him, and protect him at the dock of course.
I want to be able to give him a ring or an amulet of day walking, thats the only thing he ever seems to miss but that;s because nothing else is ever offered to him. Would he go for a cure if one was offered? We don't know because its never raised as a possibility in spite of Jaheira intimately knowing a cure from BG2.
And yeah I haven't fought the brain after my first playthrough either. I really detest what the ending didn't give us.