If you want to make conversion notes for what's up in the previews, those should be stable, and I doubt I'd write any fluff for them anyways (I'm horrible at that kind of creative writing). The only changes I'm thinking of mechanically even are adding a few more Battle Talents for the Dreadnaught and tweaking the levels that some of the Cyberneticist abilities come in at. They're all playable with the old MaI modules anyways. The PrCs still mostly need to be rewritten and I'm dragging my feet on how to rewrite the modules and module lists for the final versions, though. But mechanically, it's playable.
