CoP are long because they were the best tomes in the game. CoP length tomes for 2 magic resist sounds silly.
they're long because when they were implemented they were not meant to be finished.
Also given Woldoffs' previous posts I can only assume there will probably be answers to hitting the exp wall, from what I can tell they have taken a great deal of what we as players have been saying and working on it for some time.
lastly since it does look pretty clear that woldoff and the staff have been in fact listening and working on this stuff it wouldn't hurt to let us know, lol come on a message from the staff saying "yep we hear that and were actually working on that now just will be a bit", or something would do wonders to reduce player frustration.