They must have some sort of plan in the works since they've strongly hinted that their goal for the future is for new players to jump directly into the new story arc being developed for 7.0 instead of being forced to go through the 1-90 MSQ first (though that would remain an option).

It might be a secondary leveling path. 2.0 to 6.0 (or 6.55) would be its own leveling path with 7.0 (or 6.1) onward a second leveling path.

I expect they'll have some sort of announcement at the next FanFests for how things will work in 7.0.