Note: I think that JUST having the ability to drink a potion as a Bonus action doesn't offset the balance that much. It's when you allow this AND Throwing Potions AND Clerics using Cure Wounds and Healing Word in a single round (or using Preserve Life to heal everyone 12 HP). It's the combination of ALL the homebrew that really throws a huge kink into the mechanics of the game.
Likewise, if they JUST allowed clerics to cast Cure Wounds AND Healing Word in a single round, but they restricted spellcasters from using bonus + Level 3 or higher spells, that would also work and not be a big deal. At least then we wouldn't have wizards flying around the board casting Fireballs from advantageous positions every time, or Lightning Bolts or whatever. And again, it's this homebrew + using potions as a Bonus + Throwing Potions that makes healing ridiculous (not to mention the Help button auto curing 1 HP every time and revivify being able to be cast by everyone).
Again, I'm not pushing for an absolute RAW 5e experience. I'm pushing for a CLOSER to 5e experience to tame down ALL of the homebrew that makes everything extreme. It's all the homebrew together that is making the game so RNG based and volatile. Tame things down. Reduce the extremes. THAT is more of what I'm looking for.
And I'm hoping that all the homebrew is just because it's EA. Hopefully at Full Release they WILL have options to decide for ourselves: Do we want potions as Bonus or Action? Do we want spellcasters to be able to cast both Action and Bonus for any spell?, etc.