If you add the off-season category increases we're probably looking at a near 30% increase in one year. For those who particularly like the former SPG hotels what's worse is the removal of the last "no blackout" benefits from Starwood days are now completely gone forever, even if Marriott hasn't been policing it for the last year when hotels weren't following T&Cs anyways.
I really feel for people who still put a high proportion of their stays to Marriott. You are getting screwed and it is only going to go in one direction from here.