Seeing as Block Party CS’s are going to include Knockback Nemo which is not in the actual BP game, I have one small suggestion that I think may be of importance to good / improwing BP players that will also only be avalable in CS games.
Allow players to practice or jump right in to fast-paced rounds, Allow players to change starting round speed to anywhere between the slowest and fastest round speeds. To help with this maybe multiple lives can be an option too?