I've just finished watching the vods and one thing I noticed is that C9 played fine, nothing out of the ordinary or special.
I wouldn't count Lotus as it's a new map and it was just deathmatch most of the time, but on Pearl they were overly agressive and almost threw some rounds with some bad decisions, except that PRX were way worse.
Maybe they just played risky and agressive because they're against PRX, if that's the case it slightly makes sense. But if not they should work on a couple of things, because DRX will definitely not troll or throw 99.9% of the rounds.