Unfortunately, basically, the Pre3 is a Pre+, with maximum overclock, and 50% more display area.
Enyo works very well on 3.x. It would be my guess that there were many things in the 2.x roadmap that we might well never see, thanks to the Apothekerlypse, such as .. making sure that there's a 2.x ver that runs Enyo properly.
Or maybe Enyo 1.1 will bring some of that too.
I think 3 does need some help, but I don't really see it being any worse off than 2 in any of the areas that I've seen.
BTW, if I type "face" into Just Type on my TouchPad, the first option is "Facebook Tablet", followed by some Facebook contacts. Not sure what you're getting.