Nola has had some pretty bad luck with the Pads, but that seems to even out from the incredible amount of good luck he had in Seattle this year. Currently, his batting line is near identical to last year's, save for a bit of extra power. But he's a 30 year old catcher, so I'll be surprised if the Pads get 3 good years out of him.
I know next to nothing about France, but he has hit every he's been and has the ability to play multiple positions (though it doesn't appear he plays any of them particularly well). Trammell I believe is a 50 grade prospect. So Preller traded a 50 FV grade prospect, a utility player with a starter quality bat, and a couple other useful pieces for a 30 year old catcher and 2 BP pieces. Pretty terrible value there, imo.