Level Syncing isn't the best solution

[Kirsten_Rev]

Yeah I can't wait to run with 3 other max level buddies and blow through roulettes everyday and leaving newbies with even longer queues. I can also just kick people that haven't reached level cap and hoping for a max level rando to fill since difference in playstyle and all that jazz

Did you bother to read the OP? In particular, I call your attention here:

I think there can be another solution- like simply lowering the output of our spells to be on par with what we're doing. I have a level 70 rotation and I should be able to use and practice my level 70 rotation. Even if it doesn't do all the damage that it does at level 70, I should still be able to use it when doing lower level content.

This would never create a scenario in which people are kicked in hopes of a random level 70. In fact, it arguably would afford preferential treatment to sub-70 characters, since as others have mentioned, it's a lot easier to achieve optimal damage output at level 20 than it is to achieve optimal damage output at 70.