Just started testing BG2EE and had only a quick look at fighter and shapeshifter. Here's some issues to consider...
Shouldn't Aasimar also get resistance to Electricity? At least in NWN2, they had that. Tieflings on the other hand do match that, though maybe you're using a source I'm unaware of [Different source used]
Sunscorch by Aasimar doesn't have an icon in the innate abilities section (looks like empty space) and has no effect damage-wise [Fixed]
I cannot see the "pip