As I always say on this topic:
There's so many semi permanent "surface" area effects in DnD 5e., but Larian hasn't implemented that, but instead put in other options. Why not implement "Create Bonfire"? It's a great cantrip, which is balanced, unlike the Larian-Firebolt.
Barrels isn't illogical, and it's something you could put into DnD 5e, but I agree it's a little over the top currently.
Surface effects has a place in BG3, but it should be rooted in 5e rules. Having every goblin have Fireball grenades is OP as heck. Why not make it a single target damage over time effect if it hits a person? That's more in tune with DnD 5e.
All in all I feel Larian should read the Players Handbook, Moster Manual and the Dungeon Masters Guide, and other rule books. What they want exists there, but with a lot more balance.
