I would have loved more surface effects. The game is not a DnD simulator anyways, lets be real, they diverge MASSIVELY from 5e on a lot of rulings already (a major one being casting multiple spells on one turn for example), and it is fitting thematically

I think it would be a lot cooler if there were more spells that burned, created clouds, electrified these clouds, then you set them on fire to create steam...
Would allow for a lot more creativity and experimenting

But oh well, I will always be alone in that, I guess