I received the same information from Intuit.  They are not supporting it.  We're in the same boat.  It is not feasible to file that many extensions through myconneCT and many clients do not want to go on extension.  

The CT-1065/CT-1120SI for composite returns, even if you don't want to elect to file PET, is calculating a negative tax liability on the CT K-1 if there is a loss.

SMH