So if they update PvP in a couple of months, the people that get back don't need to grind in PvE before they can start back in PvP.
All of this means that when Anet puts out a big PvP patch, everyone can get back and see if the PvP improved.
The problem is that few people are willing to return to a game after giving up on it. The population is already almost completely gone (there might be a few hundred players PvPing at any given time). It's going to be hard to win people's trust back.