There's more than the little hills. For instance, the amount of narrow turns, and there are plenty of those in Leuven. That means constantly breaking and accelerating, and a fight for positions. Combined with the distance, that should create attrition, surely. Also, I'd expect there to be a couple of crashes, and that breaks up the peloton automatically.
Most importantly: there will be teams that will want to race aggressively to shed as many riders as possible. I don't think this will be a walk in the park.
Most importantly: there will be teams that will want to race aggressively to shed as many riders as possible. I don't think this will be a walk in the park.