I don't see why skills from the newer classes/jobs shouldn't be able to cross class so I agree. However I personally would prefer if they kept a level cap on how high of a level you can cross class from say thirty. I assume the sixth cross class slot you speak of would allow dps to take from mch, tanks drk and healers ast correct? Even if they just allowed from your mains two cross class pools a sixth slot would be nice.

I just think thirty in two other classes besides your main should be more than enough levels to unlock all your cross class abilities. I say this in regards to exceptions like mantra, yes I already have it but fourty two is too high for a cross class skill imo.