Ok, I can understand the angst about making something else "easy" in the game, I really can. I'm one of the more vocal people on here about not expanding job abilities and the like to preserve balance and such. However, even SE has acknowledged that the current skill-up system is not getting the job done and they have been looking for a mechanism to correct that, particularily for those skills that are extremely hard to do. This is a viable idea that even the SE development team has expressed an interest in.
To allay concerns, I can only offer this, and it is simply my opinion:
1. Jobs were designed with a particular skill set in mind, and even hardcore elitists have great difficulty reaching those peaks due to holes in the current system, this is simply designed to allow jobs to reach their actual design.
2. the rewards for participating in this system are designed to simply be used within this system, nobody intends that you get a reward from the gym that will put someone's mythic weapon to shame.
3. I personally believe that you shouldn't be able to gain XP in the gym, only skill and gym rewards, and I think that is sort of the universal feeling.
4. To compensate you for your time away from XP, Crafting, farming, etc. you are rewarded with an increased rate of skill-up, but noone is advocating just botting your way from 0-356 in 1 day, but more like a max of say 5-6 skill in an approximately 30 minute session if you are approaching your cap; in other words, your time in the gym is still putting in your time.
5. To satisfy elitists, the gym rats (or maggots if we go with the military training version) still need to acquire spells, gear and everything else needed to be viable in their job, i.e. 354 marksmanship isn't going to do much with a light crossbow and a bronze bolt against AV.
I'm in favor of this for more than just my own benefit. I don't have to put up with guilt trips because I'm not willing to carry a level 90 noob now, I can simply send them packing, tell them to come back after they put in their time in the gym, and /blist them until they do.
Seriously, SE isn't going to do away with the ability to go 30-90 in less than a week with no idea of how to do your job at the end or no skill to get anything done even if you do! This is the complement to Abyssea. If the current playstyle is "level now, skill later" Abyssea is clearly the "level now", this gives the "skill later"-hopefully at a saner rate.