I spoke to a very knowledgeable salesperson, Michelle, at Xrite yesterday. I was asking about most effective upgrade path from PM5. I have a purple dongle for PM5.
You can also buy the full Publish Pro2 kit for $1,849 street price as a new user. No upgrade, no previous kit.
So I don't think you are basically getting anything from the upgrade, as that amounts to $1,800. At least as far as I understand from what you outlined.
I posted a link previously to ColorHQ, who had Publish Pro 2 at the $1,849 price. They were one of only 2 sites I checked. May go lower soon?
No reason to hurry for me - no real breaks by acting now. My prints and profiles are fine, and I am happy. Basically they just dead-ended the current tools (at some point soon) with not much of a break for current users. And reduced the residual value of our older units to almost $0.
Whole lot of "meh" as far as I'm concerned. At least for $1,500 with Adobe CS 6.0 Production I get a whole lot of quality code that has been Beta tested and continously improved. Xrite sounds like a garage shop software developer, based on the interface. At least the underlying profiles are good.