The PvE campaign expansions weren't able to provide enough variety of gameplay for me. Otherwise, I would've love to see more and more expansions provided.
As is, though, my interest in GW would've eventually reached a low no matter how many campaigns they added. My overall interest for it started to dip around the end of Nightfall.
Who else would have preferred more campaigns as opposed to GW2?
Bryant Again
Perkunas
One thing I have wondered about, what happened in the catacombs after they were closed by the searing. I had thought maybe reopen the entrance in Sardelac Sanitarium in HM. Maybe add a green drop for the core professions there. The ground shaking from the searing could even have opened other deeper chambers. These had been thoughts, just never expressed until this thread appeared.