Power Herald lost Equillibrium(free 15k damage every 18 seconds), but in the process gained more dps in the forms of forceful persistence, sword offhand changes, and charged mists. According to the last qT benchmark with power revenant, it did 26.5k dps, so with equillibrium removed, it currently does about 26k dps. Now if we add in forceful persistence, during jalis you are getting about 28k dps. During glint, you are getting about 29k dps if pulsing boon duration and protection(standard herald boons). So with forceful persistence alone, you're getting a standard 28.5k dps across the board.
Now onto the new sword skills. Compared to sword 2(the main damage dealer in the old rotation), sword 4 does about 29% less damage, sword 5 does about 38% less damage. Compared to an auto attack, sword offhand skills 4 and 5 do about 50% more damage with the same exact cast time. So with the new sword offhand skills, you're effectively getting off an additional 1.5 sword 2 abilities per legend(only with alacrity). This alone could easily raise the dps to 30k.
Now I bet you're saying, "But anet made the skills cost so much! Do they hate Revenant?" That is why for the grandmaster traitline in Invocation, you'll be taking Charged Mists, which gives 25 additional energy when swapping at 10 energy or below. With Jalis, the 25 energy lets you spam 1 2 4 5 with hammers while still having 5-8 energy leftover at the end, so there's not much room to mess up your energy conservation. In order to perfectly get below 10 energy on herald, you actually only need to use boon duration and protection while spamming 1 2 4 5, so the rotation is the same with offhand sword added. So the question now becomes, is 30-31k dps, permanent protection and permanent 33% extra boon duration worth a slot in a party?
Edit: I actually messed up and it's only 4% extra damage while using boon duration + protection, but it still is 8% extra dps for the same energy if you use all the facets except the heal and elite. I also forgot about the GoTL nerf, that makes the dps around 26k, feels bad.