I put my team on ice for pretty much same reasons. Into October I had one character of five with a legendary and not even a great one. World quests are insanely boring, too.

I hit the same bust cycle with every expansion. I play the questing bit and then a little of the grind until it forces me to quit 5 boxing. Then I disappear for a few months and come back to do 2s or 3s arena.

Same deal this time. Probably come January I'll be back to grind up a 3s team.

I feel like the game could be great but every expansion they roll out the same daily fest in just another form. Play style is very rigid with time gated rewards like dailies. If you don't do the dailies you always fall behind. This no doubt hurts the longevity of the game.

I also concur that multiboxing is the cherry on top. If not for multiboxing this experience would be incredibly average at best. But per usual doing 2s and 3s is actually very fun. Even if it sucks to lose a lot of games =D.