Do you think that fire surfaces will be depreciated as the game advances and levels/spells overcome it? Take for example the changes to firebolt being weaker in Larian's version at max level possibly doing 4d6 with fire effect 1d4 x2 (initial application and next turn dmg) vs 5e doing flat 4d10.
6-32 dmg with 2 turns of fire surface (I think thats about 19.32 avg?) 1-40 dmg with 1 application of direct dmg (20.5 avg?)
In scenarios where the ground can't be lit on fire due to blood/water/liquids/mist/wet conditions firebolt is even more depreciated in Larian's version.