simple idea i just had. couldn't find it suggested elsewhere on or the TDL so i'll fire away.
simple put the cards set is worth equal to the round number. i think this would reduce the variation and chance based on cards as the maximum that a set can be worth is about 5 more than your last. i just think it would be a nice option and would mean cards keep up with the rate of play but don't force it like in esc and chance is left out more unlike flat.