People think PCs need more power against bosses? Wow, that's a new one.I think this shows why I don’t have much respect for Mearls as a game designer, compared to others in the D&D design alumni.
Legendary Resistance could be more interesting, sure, but it’s a great mechanic that adds a layer of strategy to fights that isn’t there without it, just like legendary actions and the underutilized lair actions.
I’ve recently decoupled legendary actions from a specific creature and made it a resource the whole enemy team has, and I use lair actions as they were in 2014 as simply enviromental effects, and it is awesome. The enemy leader shouts a command and the whole enemy team moves half speed imposing disad on OAs against them during the movement. The boss gets stunned? Another creature can take command of team bad guy and issue those commands now, and some legendary actions don’t even assume commands so much as just practiced tactics.
Decoupling legendary resistence from specific creatures has a similar effect, allowing the DM a small number of negations. Now, I actually have considered award inspiration to someone if LR negates an action that costs a resource, OR making it so that if the enemy uses a LR to pass the save, you don’t spend the resource.
I think those are vastly better ideas than complaining that control effects are broken.
That and give fighters legendary resistence instead of indomitable, so it’s two sided. Seriously it’s makes people who hate LR hate it less because it’s a thing that some PCs can have too.
ETA: by decoupling LR from a critter I mean that if you have a vampire in a battle you can use a LR to make any creature succeed on a save as long as it’s an ally of the vamp.
He's not "complaining". He believes they are broken, from a design perspective. And, many agree.