I've wished the same thing. Lae'zel would be fun as a dual wielder and Gale's mage hand does absolutely nothing.
However, there are story issues there. Shadowheart makes the most sense as trickery domain; Wyll only makes sense with a fiend patron. So, while I sympathize with your position, I really don't think it's going to happen.
I agree with that. I'd rather the character's mechanics reflected their narrative rather than be fully customiseable.
There could be some room for customisation I guess. Wyll could fit as a Hexblade, but they're probably not getting implemented due to not being PHB. If we do limit ourselves to PHB content, the only cleric domains I could see fitting Shar would be Trickery and Knowledge.
Cantrips make a little more sense to be able to choose than subclasses to me. Not that I would ever
not choose Mage Hand.
