Dougie - I don't think it is a standard 'head thing' but I do think Kia gets into an 'intensity' trap from time to time that is 'head' related. She is I think playing much better than people give her credit for but the most obvious part of her game is her shooting, and when a shot is off it is what people remember most. But she is sort of like the freshman Moriah, if fast isn't working, try going faster - for Kia, if this level of intensity isn't working, try being more intense!
I also think each new year is harder for guards than post players to adjust to. We saw with Moriah that November and December were tough from a shooting perspective, and the same was true with players like Bria. Figuring out when it is appropriate to take your shot vs. passing is a bigger issue with perimeter players and that indecision messes with accuracy. For post players it is simpler - when they get an entry pass and are open they shoot, when they are not in good position, they pass back out. When the wing player gets that pass out, do they immediately shoot, or do they continue with trying to get it back in again. Each year is different as the team works on their rhythm, and the guards/wings are the ones making those choices.