kalia724's comment is an apparently-strong argument that I'd never heard, and you know I've actively looked for arguments for and against. I do think you're putting a bit much hope in absence of evidence of criticism as being non-negligible evidence of absence of possible criticism - the space of concepts working scientists don't bother thinking about is ridiculously huge, and cryonics hits quite a few green-ink heuristics (unfairly, IMO, but it does) which gets it filed with the mental spam in short order. edit: and see my Facebook post for a mutual friend of ours noting he has qualms about even writing something serious about cryonics as he risks a significant professional status hit by doing so - cryonics is that low-status.

kalia724 evidently doesn't have time to write this up properly in the foreseeable future, so I think we'd need to ask around to see if there is, at the least, a nameable neuroscientist who thinks kalia's assertions against cryonics have something to them. (I've just hit my socialmediasphere with the question. You, and everyone else interested, probably should too.)