My biggest complaint this year doesn't really have much to do with the game itself, but more about the robot rules:
The 78" height limit. Keep it at 60" so that we don't have to struggle to get our robot through doors, please.
While Recycle Rush isn't my favorite, it certainly isn't the worst. At least you can see the progression of the scores and the huge point swings, unlike Lunacy where you can hardly see who's in the lead. Matches aren't decided in the first 5 seconds like Zone Zeal was (although it might turn into that at higher levels of play) and the whole game doesn't stray away from its original point - stacking boxes - and dissolve into a brutal King of the Hill like Stack Attack.
Also, I really don't like the hokey themes. The terms "Moon Rock" and "Litter" make me cringe.