Tales and Chronicles
Jewel of the North, formerly know as vincegetorix
Well, at least we're going to have one more rampantly overused mechanic that isn't actually as good as everyone touts it in the design space to keep Advantage and Proficiency Bonus company.
So far we havent seen much use of the new Exhaustion mechanic.
And I way prefer a mechanic use in many instance than a mechanic only used by a small subset of character (like the 2e psion stuff), if I have to choose between one or the other.