Removal of classes would give them the opportunity to fix SMN and I think that's the only reason why they would do it. Since if they only have jobs, then it gives them an excuse to re-evaluate and recreate the SMN job with skillsets that focus more on the pet and less of an DoT with pets on the side.

Also think it comes with the mentality that while lv 60 as a class might of be semi viable in a handful of situation, 70+ it's going to become a lot less viable since with each level cap that's another -10 levels of missing said abilities, and no amount of cross-class abilities is going to help you overcome that hurdle.