In response to folks who want to "level more": I don't understand how grinding out more classes is really a good thing. I think new classes every once in a while is a good thing, but don't really feel "leveling up" should be the primary focus of the game. Just because the current endgame is lackluster doesn't mean we should assume (or accept!) that it will always be that way. Instead of forcing the armoury system to bend to the lackluster endgame, endgame should be fixed (more challenging, more varied, more content - better drop rates) so folks can actually enjoy doing that. That said, I could care less if they add 20 new classes. Anyone who cares enough will just pl all of them to 50 in a week and get back to endgame.
In response to multiple jobs per class: In theory, I like this idea. However, the current implementation should be changed drastically. If the job system is left as is, there would be very little variety between jobs. Right now, you get a smattering of unique abilities. It's not really a drastic change. Hopefully the action bar and action slots will get a massive overhaul in 2.0, because honestly there's just not a lot of room left to put things in there. It could be good to scale back on class abilities and/or add a lot more job abilities, to make each job really stand out*. Maybe even add in class-specific abilities that don't carry over into your job.
*It some cases, it feels like they really forced the job abilities in there. My principal complaint being that BLM is essentially a "thundermage". So much so that Burst is their 15 min. ability? Please take it off the 15 min. slot. Please. At least in FFXI you had the option to use other elemental nukes, even if thunder was usually your best bet no matter what. I'd dearly love to get away from this, and make BLM a versatile caster. Reward BLM for nuking with the appropriate element, and don't make it so inviting for them to fall back on Thunder all the time. Make monsters who are greatly and/or wholly resistant to Thunder. Indeed, make some monsters that absorb Thunder. Better yet, make some monsters that spin the elemental wheel, and nuking with the wrong element causes them to absorb the damage.