"Feature request" concerning Shelfs build in counterbalancing

Hi all, hi psychoJS authors,

after playing with the counterbalancing demo found here it seems to me like counterBalanceSelect does not note if a participant in a group aborts the experiment or actually finishes it. I think this is a very important feature as abortion rates are pretty high in online studies (at least in mine :D). If aborted experiments are counted as completed, then the objective of the counterbalancing to give us more power in determining the group sizes in a study is practically defeated. Is this feature something that could be added in the future?

Thanks for your great work and for helping me/us figure out the cool new features of the shelf!