I think it is fine to have "pot stirrers" and their supportive minions. Keeps things lively.
No one has to read anything anyone says if they don't want to. It is also natural that those with different experiences and different personal tastes may well disagree, and say so.
A few thoughts:
Personally, I'm not stepping backwards to 35mm from any maker at any megapixel as my main Image Quality tool, nor am I about to start shooting 5X7, 4X5 or 8X10 film again, even though I like the aesthetic ... for someone else, not me.
Liking someone's work isn't the same as liking the same tools for your work, unless you want to be like someone else.
I do not mix up Phase One, Hasselblad, Pentax, Rollei, etc.. They are different approaches that happen to be 645 based MFD. Painting a format with a broad brush based on a like or dislike of one make or model, or a personal experience is unfair. Also, if you are directionless, you could probably end up trying all of them eventually and never be satisfied ... then leap on every new gadget the makers dream-up and sell with the ferocity of an evangelist.
Or, you may know exactly what your direction is, and be perfectly content with something other than MFD. Never the twain shall meet.
I do no buy the premise that MFD is for slowing down because of the gear. I shoot candid and structured wedding work with MFD, and there is NOTHING slow about shooting a wedding. Of course, I don't machine gun everything and cross my fingers ... never have.
I do not buy that all MFDs are low ISO machines. "Low" is a relative word. My H4D/40 did a beautiful 1600. Most 35mm DSLRs that do higher ISOs introduce to many image compromises beyond 1600/3200 for my tastes ... so it is a non-issue IMO. Besides, I often use lighting anyway.
I understand the desire for weather proofing ... for some users. Weather proofing is another non-issue for me. My subjects aren't out frolicking in the rain after $2,000 worth of wardrobe/hair&make-up, and either do I without some cover. Besides, I've been caught in a howling Monsoon down pour a few times that soaked me to my shorts in a few seconds, and the H camera just kept on shooing. Tight tolerances perhaps?
Pricing is also relative. Depends on how long you've been in MFD, when and how you paid for the initial price of entry, and how wise you were in up-grading. If starting from scratch today, in this economic climate, it has to give one pause. However, if you are pretty focused on your creative direction the path will be clearer, either way.
-Marc