The 2.2 TDCi Automatic is not a PowerShift transmission.
It uses an Aisin AWTF-80 SC conventional autobox, which Ford call the AWF21. They're not a bad autobox, generally reliable but they are a very compact design and a bit of a nightmare to repair if they go wrong (although so is a PowerShift).
I think I'd go for a 2.0 TDCi 163 with PowerShift I wanted a diesel auto. I'd take a 2.2 over a 2.0 with a manual though.