You're completely off base blaming Abyssea for new players not knowing what the hell they're doing.
I've been playing for two months. I've never had a previous account, I'm one of those rare actually new people. I bought Abyssea because I thought I would just get a job to 30 than leach to 50, do my LB, leach to 55, etc.
EVERYONE seems to think that people that do Abyssea parties are like "Oh hey, you don't have Cruor to buy keys? You're literally just going to join this party, sit here, contribute absolutely nothing to the party? OKAY! WE"D LOVE TO HAVE YOU!"
If you aren't key whoring, you're not going to get into an Abyssea party as a sub 75 job. At least not on my server. (Odin.)
If you wanted to argue that new players get the shaft because everyone is in Abyssea, and new players are basically stuck to Qufim parties, there would be some merit in that. I set up all my own parties, and it can be difficult to find parties for post 30 places, however, you would actually be surprised.
There is a nostalgic feeling for places like Crawlers Nest and Gargliage (Pardon my horrendous spelling ><) And people seem excited to go to those places. It's a nice change of pace from just leeching your job to 90.
In conclusion:
Everyone needs to calm the f down about how new players are just leeching jobs to 90 because of Abyssea. I would say MAYBE 1% of the new player population is actually doing that. If that much. New players (try to) make parties and level the exact same way you did when you first did it, at least with their first job.
And, unless this game is vastly different from EVERY OTHER MMO, after someone has gotten one job to 90 the "real" way, they probably have a good grasp of this game. Yes, a WHM and THF have VASTLY different mechanics, but you're not completely new to the game like you were when you first started. It's easier to pick up what you have to do and what not to do, when to do what, etc. The 1-30 level grind teaches a lot, regardless of how you want to spin it.