The problems with grinding is for most ranks it is not efficient at the minute. SP/EXP per hour is slow, mobs are spread out to far with long respawn times and Efts and Raptors are pretty much the only things worthwhile doing.

If the lowered respawn times so you didn't need to run all over Eorzea to find the next mob, gave us variety and places to find the perfect mobs for every rank I think this would go a long way to solving some of the problems.

Also a SP/EXP bonus item wouldn't go a miss like the Empress Band to work similar to GA but outside of leves.