Hell yes, +1.
It's very frustrating that almost every round of every battle, even the environment attacks you, and there is zero defense. Goblins just SHOWERING you in "fire grenades" just seem ridiculous, for example. Also they sure do have lots of spells aswell. At the goblin camp, if a fight breaks out - BOOM, every surface is on fire, two of your characters have "hunter's mark" on them, and one gets a sleep spell on them and another gets color spray. All this before you even get to do anything.
But this is DnD, and why DnD's system is a failure. The saving/attack throw crap is garbage, and so is concentration.
Concentration from DnD is disabling you form properly setting up spell combos to mitigate the number of enemies in some fights. Case in point, the Githyanki Patrol fight. 50% or less chance to hit normally on each of them,3 of them use ranged attacks as well. Shadowheart is stuck casting Bless, and thanks to Concentration no other utility spell but Hold can be used (at a 60% success rate). Want to use your druid's faerie fire for betetr hit rates? Assuming it passes the pitiful 50% chance to land wasting a precious spell slot even if it does not land, you are then stuck in concentration with it.
So what happens if your druid lands faerie fire? He cannot use fog or darkness, he cannot use entangling vines, he cannot use barkskin, he cannot use spike growth. And most importantly, he won't be doing any damage because he cannot use moon beam or flame spehere or conjure flame blade, which for some ridiculous reason as a melee weapon that requires you to go in the thick of melee, breaks on concentration.
Ditto for your Wizard/Warlock. Need to cast Hex to do any damage worth a damn unless you spam magic missiles rank 2 with the necklace? Too bad, if you want to use fog, sleep, flame sphere, Tasha's, etc, you cannot use any of your other spells.
This RNG hit/miss system on top of concentration is leading to a lot more exploit and cheese than any of Larian's mechanisms, because the fact is the vast majority of videogame players do not want their battles to have an outcome down to the roll of a dice.
Concentration is not a Larianism, it's pure DnD sewer garbage. And it keeps 95% of the spells from being used, because what concentration does is it forces you to use the most universally applicable and powerful spell, and since spell slots are so limited and fights drag out so long thanks to missing half your hits, you run out of spell slots really quickly and the concentration mechanic makes it so you don't want to swap out concentration spells as needed because spell slot efficiency is so important.
