I've just taken a quick look at CopyTrans Manager, and although I can see it useful for editing an iPhone and/or manually loading tracks in, its not a syncing tool. If I edit an MP3 rating on the iphone, I can't see how that will get back either to the original MP3 on the PC, or, how MM would then pickup that change too.
So for me, compared to the inhouse sync that MM used to have, or even the iTunes-plugin script, it doesn't cut it.
I too would've liked to of seen this progress much faster. Maybe the devs can open it up on the forum (create a technical thread) so we can see exactly what the problem is, and then other devs can comment on ideas.