It's pretty much the same deal as WoD.

Sub and Outlaw will both be competitive, but with rolls reversed. Sub is now the sustain dmg pressure spec, and Outlaw will be the control/burst window spec.

Ass continues to be the wombo combo one shot spec that will be fun in BGs and work in some all-in burst somebody down comps.

It is worth noting that Sub is borderline unplayable in the pre-patch though, the honor talents/artifact are massively important to its damage potential.