Even a reaction is too broken.
Reality check. How fast can you drink a flask of anything? Toss a corked flask to someone. Have them pop the cork off and then drink it.
A reaction is meant to be a split second moment. As an enemy is retreating, you seize the opportunity and stab. It is not meant to be you catching a bottle, uncorking and guzzling. Catching, yes. Using, no.
And again, it completely breaks the need for a cleric or wizard at all. You can throw potions that work better than spells. What do you need spells for?
Wizards and clerics get the shaft in BG3 because of items. Just like Rogues get the shaft because they have no expertise and everyone can sneak as bonus, drink potions as bonus, pick locks with just as much skill, etc.
The game breaks classes. Take fighter. Everyone can perform special combat maneuvers now based on weapon type. So fighter maneuvers are no longer special.
Over and over again, they are breaking down the classes so it is kinda like, who cares what class you pick. It really doesn't matter much.