I'm sorry but I havn't needed to use a single class for any content since the advent of Jobs. I know they can be used for speed runs in Cutter's or Aurum Vale (however, only one or two people in the party need to be a class), which is a gimmick.

When I solo, I use either BLM (nuke/sleep combo) or Warrior (steel cyclone/rampage).....I absolutely see no compelling reason to have classes. It's a hassle carrying 17 sets of gear if you have all jobs to 50. The only reason people used Gladiators is because Paladins are lacking in tanking right now and can't kite as well. However, once pally gets adjusted (very soon) there's little to no reason to use Gladiators.

I know people like classes maybe for nostalgia sake, or variety sake... but there are no COMPELLING reasons to have them. The one in a million opportunities do not justify the headache of maintaining separate gear sets, separate macros, etc etc.

My 2 cents.

PS - I have no idea what the solution would be.