Of course they are. Biden will be crushed in the debate even if Trump is not allowed to speak.
Despite what was said in Moran’s PJMedia piece, the Dems could only consider allowing Biden to appear in a presidential debate would be if Trump had zero influence over anything Biden would have a burden to address.
IOW, having the media throw Biden softballs is as far as they might be willing to go, but Trump must not be allowed to ask Biden any question or alter the media-prepared narrative (heavy on the prepared part).