The one big issue that a lot of mmo's do is that they dont have shared progress for the account.
You are right, but fortunately the CPs are account wide (imagine the pain it could have been otherwise...)! Nevertheless having longer guild story lines and having the guild-lines account wide would have been great!
I would love a class change token. My main is a DK and I'm just not a fan of DK's.
Alternatively, they could offer account wide achievements, account wide motif knowledge and allow me to reorder my toons on the login page. That would remove any of my need to class change as well as I wouldn't actually have a "main" anymore effectively.
In a roleplaying point of view, a nightblade abandoning his twisted paths to become a devoted templar seems acceptable to me. I mean, how lore-friendly could be a race change, really? Although, as a MMO feature, flexibility is always welcome. You see, time can be very precious to customers and so are the characters in which their time is invested. So, it'd be very nice if our cool-looking, motif knowledgeable character could have a chance to experiment in different combat-skills - if we have the money for it, of course.