Every single person I played with regularly two weeks or more ago is playing ESO. Some of us even formed/joined a guild from our relationships from DAMP.
I think people come into DAMP now and then when ESO is on backup or down.
Considering you probably have a year or more of content lined up for ESO -PS4, it's going to be tough getting players back.
The DLC was great but as I have said before this needs to expand big time if they want to keep players from new IP or at least going back and forth.
The good news is that the DAMP concept is still unique and fresh and just need more expansion to really become something cool. I don't believe on demand 4 player or more dungeons/Map is readily available on any other console?? ESO grouping is still pretty poor so that doesn't count. GL