[Kage]

I don't think that this is going to be as big of a deal as anyone is making it out to be.
Sloped tops are almost mandatory since you don't want balls getting stuck...
I do not think that they would design a rule to penalize someone for bumping a ball of of a stationary slant on the top of their bot...I mean, hey, you can headbutt the ball in real soccer right?

but I still want to know the definitive answer of this...