Had me worried there marty! Let's keep this game alive!
The servers could do with merging I think, but with the servers/languages set up the way they are I don't see how they can manage it.
With two english speaking PvP servers, if they merge them together (one medium pop and one low pop) you get one server pushing on high population.
Which might be fine, possible queues at busy times, but what happens if the game's popularity picks up and more players flood in? Opening a fresh PvP server at that point would leave one high pop and one completely empty with just the overflow of players going to the new server, leaving them in a ghost town much worse than the low pop servers now, I would expect.
And these would be new players just starting out, they won't keep their sub going after free month if their brand new server is completely dead.