Here's the thing, we have 'may have' and 'possible trade'. What usually happens is that we hear rumours of names involved, but never the entirety of a deal until it's done. Nowhere has it been reported that there was a deal in place, not a single party involved has mentioned anything to my knowledge either (not that they tend to) so it's rumours, and we know how they go when talking about trades.
While Larsson wasn't living up to his possible 1st over all billing, he was still a better trade asset than Ceci. If we're looking at this without the goal of trying to shame management, there is little chance that there was a 1 for 1 offer on the table and PD simply dragged his feet.
Regardless, it would have been nice to get Hall for Ceci, though he would likely be traded at this point if we're looking to rebuild.