Poppa,
I think that how these kinds of movements turn out depends on how there 2nd and 3rd generations of adherents handle them. We never know how they will turn out until years later when they actually do turn out. We didn’t know how Moses Mendelshon’s inherently legitimate approach would turn out until his students and his student’s students turned his views into the reform movement; we didn’t know how JTS would turn out until the 1930s; and we didn’t know how chassidism would turn out until the late 1700s. We can speculate, but we won’t know how YCT or Open Orthdoxy, or JOFA or whatever will turn out for quite some time.
Don’t get me wrong, a lot of it doesn’t sit well with me – mostly hashkafic reasons (which I can mostly brush off), but sometimes for halachic reasons (which are a lot harder to be complacent about). That’s why I think that healthy criticism of these developments is appropriate – discussion of hashkafic objections, and very strong disputation (framed in halachic terms, not unilateral “kol korei’s”)in halachic matters. What I think is not appropriate at this point is blanket and strident condemnation – calling them reform, apikursim, ect. That sort of thing is not called for until we know how they turn out. Not being neviim, we really can’t know yet. Will this be another chassidic/TIDE/TuM change or will this be a reform/conservative type change. Time will tell. Until it does, I think we should keep the lines of communication and reasoned halachic and hashkafic discourse and disagreement open and active.