I paid for the plus and to be honest, the widgets were alright but not really worth the cost imo.
I felt there are better calender apps/widgets out there, better 'top friends' apps/widgets, better text apps/widgets etc.
The only one I do use is the Facebook one, just because I like the 'style' of it. Functionality wise, its actually pretty lacking.
Resizing widgets is actually a misnomer. You are actually resizing the space that the widget occupies, not the actual widget itself. (few exceptions to the rule) For instance, if I resize the Pandora widget to a smaller size, I get half of the widget with part of it completely missing from view.
Renaming icons is cool, but I believe there are free (and I may be wrong) apps that allow you to do that as well. (although root may be needed)
I believe the bread and butter of LauncherPro is what he gives away for free...and for that I am more than happy to contribute and support...but if you are paying for the plus features purely for the features...I would regretfully have to say "Pass"