Getting only 20% Tenacity from Mercury's Treads is too little
Unless Riot's entire intent is to eventually remove Tenacity as a stat for being "toxic", 20% off Mercury's Treads is hardly enough to reduce CC meaningfully. It's a massive drop from what you could get in S5, and it leaves me feeling like Mercury's are now a trap because of their efficiency being too low.
Honestly, I'd rather have had it be Mercury's Treads only giving 20 MR instead of 25 if it meant keeping at least 30% Tenacity.
Intentional weakness, Riot? Or undertuned?
on pure tanks that go 18 in resolve to get the tenacity mastery to stack with it. 20% by itself isn't enough for most of the cc in the game. 35% was like barely enough to where it made a difference and could actually save your life. Now it's like if you get
snared you afk for 8 minutes instead of 10 big deal you're still dead.