Yeah I think that plus most of the single classes being pretty well-designed and rewarding this time (they were in 4E as well note) there's just a lot less impetus for people to MC. Of the two in my groups, one is MC'd clearly for power (Sorcerer/Warlock or the other way around, I forget what), the other was an attempt to be goofy-but-effective but which sadly ended just being goofy because the player didn't quite get how Sneak Attack works (Rogue/Monk) - he was saved by the DM overruling the rules (right decision, imo) but it was a bit of a mess.