there are so many problems.
in standard 5e firebolt and sacret flame are similar in power-level. both have an about 60% hit chance on average. 1d10 vs 1d8. sacret flame can target enemies behind cover.
in bg3: firbolt 90% chance to hit. high ground advantage. lights ground on fire even on a miss. does 1d6+3d4 dmg. explodes barrels. lights grease on fire.
and since goblins have 15 hp instead of 7 even if your 50% sacret flame hits it doesn't even have a chance to kill!
same with aoe damage. be it shatter or fireball. if enemies have double the hp these spells just suck.
as for eating a "whole chicken" as a bonus action. yes you can do that. i think i have played 3/4 of everything there is to see in act 1 and i have hundreds of food items in my inventory.
why give fighters second wind when i can just eat a pigs head every turn.
also healing spells are irrelevant since they were weak in combat to begin with and everybody can heal a downed pc and that was the only thing healing was really good for.