I also agree to a lot of things said here.
I stopped reading D&D rules at 4th ed, so my knowledge about 5e is basic at best, but some things you did just kind of break the fun, not only because they are annoying but (even if its a fantasy setting) they are incredibly illogical. Some mentioned it, everything burns or explodes. small cantrips that hardly do any damage create fields of ice or fire. Every goblin has arrows of fire/acid/thunder and whatnot...not to talk about grease and alchemists fire or acid vials. That stuff should be rarer then that. And if i look at how much gold those arrows cost...
When i examine some npcs i can just be amazed at the stats... Stuff like this makes me quit the game for a while before i start anew.
I won't complain about how close you stay to 5e rules but if you use them, try to follow them as closely as possible. Otherwise just say "our own rules based on a modified 5e ruleset". But keep functionality over show. As with the romance stuff....there is a thin line between fun to play and annoying players. Not everything must be super-special.
