I'm a vote for checking for bugs and making sure it's absolutely what is intended before rolling it back out. (Maybe run a bunch of arcade games offline and see what happens after a large enough sample size to see if the effects are what are sought.)
In my season opener, I lost against a team I'd beaten in all 5 previous meetings. Not since our first game against each other in Season 7 had I beaten him by less than 10 points. Neither of went TIE or CT, it was on his court, and I lost by 6 points shooting 37% from the floor (37-100), the worst shooting I'd done in a long long time (maybe ever?). Our teams combined for a whopping 126 rebounds (and a healthy 48 assists). While it's not impossible for my team to have lost the game, I have to look at the stats and wonder if something screwy in the engine accounted for my loss.
Don't ask what sort of Chunks they are, you probably don't want to know. Blowing Chunks since Season 4!