Rather than a version 2.0, I'd be happy if Paizo simply combined the Unchained and Core book into one book removing the things that are totally broken/useless.
I love D&D 5E, hated 4E, and have played PF since it was in Beta. These are for three different play groups...
5E is for a "simpler" crowd that doesn't want the crunchiness of PF. 4E is for those that love the battlemat. Pathfinder is for the ones that love to optimize. You can RP in all of them, so there's no difference there.
I play 5E with one group, and PF with another. Both have their places. No, I don't want a new edition, I'd like maybe just an updated PHB w/ material from the supplements.
As an aside, I have heard people say PF is too complicated and needs to be simplified... I disagree in principal... correct the ambiguous parts, yes, simplify like D&D? No...
I find it great that my 10 year old pulled out my PF Core Rulebook and created his own Wizard by himself this past weekend. He made a few mistakes, but was 95%+ correct.