I think this idea is stupid. It honestly takes very little time to level, regardless of queue times. I have leveled literally every battle class to 70, and never had much longer than a 30 minute wait to enter a roulette, and usually half that for my level appropriate SB dungeon. I always used the time waiting on queue doing the daily hunts in SB zones, and any exp bonus fates I found along my path. I usually would finish my daily hunts after the 3rd roulette for the day. Even at a casual pace of leveling solely on daily roulettes/hunts and a few fates each day, I averaged getting at least one job from 60 to 70 each week, and I still capped my main's tomes each week as well with expert roulette. Asking for easier xp is just lazy. By the time 4.1 hits I'll probably be finished with finishing off my crafts to 70, and then all that is left is endgame raids which are rarely worth the diminishing returns for time invested.

Out of all the bottlenecks in the game, not earning xp fast enough is definitely not one of them.