Is Mythic+ this season tuned to be easier than before?

So I've returned to WoW after not playing past the first season of Shadowlands, and it's really strange to see that +15 are so loosely tuned - there's a huge give on dps, death and runtime, it feels like +10s or lower from the first season. I understand boss and mob tuning is expansion dependent, and old Mythics were created with other goals in mind, it's not the thing that makes me wonder.

Are +20s new +15?