Slightly damp means no mud, nor any dust, and many more options to avoid cobbles, big factors that when present(IMHO) contribute greatly to making the race more selective. I may be exaggerating a little but when it's like this it's much closer to being just another hard road race albeit one containing some really bad roads.
As far as Philipsen goes, I think these are the absolute most Philipsen-friendly conditions imaginable, and he's my pick as favorite to win. He's shown last year he has the engine for this race, more than strong enough to be there again in the finale this year. Additionally, MVDP has already shown at MSR he's willing to work for Jasper if Jasper is there at the end and has the legs. Barring disaster these two are going to be very formidable indeed today and for me hard to see past one or the other of them winning.
As usual, I could be completely wrong of course. ;-)