Not that my opinion will hold much water, but I just happened to get a D-Line P2 in the mail today. Blue 172 (usually throw ~175). The newest DX P&A I have is from the 2010 Ice Bowl. The rim is stiffer on the P2, but the flightplate seems slightly more pliable (like a softer SS/SSS Wizard - first non-Gateway product I've compared to a Wizard's rim stiffness compared to flightplate flexibility). The plastic's a little slick, but I wouldn't say it isn't grippy. It had rained most of the day and was drizzling, and I had no slip issues.
I know you're looking for putting putters, but hear me out...I've been really working on my backhand and have been throwing a ton of putter only rounds at my local pitch and putt. I've been carrying Mercies, Pures, and tonight added the P2. Off the tee (~200' on a good throw), the P2 is more overstable than my G9i Wizards (far from new but plenty beefy) and both the Lats.
I still carried my putting Wizard and putted any extra tee shots with the same disc I threw off the tee, and the P2 needed a lot more anhyzer to get to the basket for me than any of the other discs I threw. I'm guessing if you want something more stable than a Pure (guessing you mean stable and not overstable since Pures, for me, are more overstable than P&As), then this disc is probably not what you want. I imagine it'll season really well, but as it stands after 27 holes all under 300' it has some healthy LSS to it. Not to try to scare you away because I was really impressed with it and am excited to throw it some more tomorrow. I was just surprised that a beadless disc could be so beefy.
Hope that helps.