well... David has been chewing for a long time now...and from the looks at his dvd he has bitten of more than enough (FAT old sun... )...
Thing is, the two PWPF albums were quite good...much better than the Final Cut for one: so David did a better job than Roger in his final PF-days as far as I am concerned. I add immediately that Roger did very good things on his own as well (Amused to Death... brilliant!).
So, it was a good thing for PWPF to carry on... and for Roger to go solo.
If now David has enough...so be it! If he misses Roger, well perhaps they can still find a modus operandi? And as far as Nick and Rick are concerned...they can fill some gaps here and there, or not.