Regarding the OP's burn out. I was burned several months ago and when I came back I starting by playing alts first. It helps to have some "vacation" characters to play if you get fatigued on a boxing crew.

I plan to solo a character or 2 to 80 before I level my first team to 80. I really want to enjoy the expansion before I become a zombie leveler with a boxing crew. I have 10 70's and only 5 of them were leveled together. The others were leveled to 70 solo before leveling increases or RAF.

cheers.