What we understand about the PvP ranking let us thinks that it's a kind a chess-like swiss-ranking system. Obviously all players are reaching a cap at Apprentice title and cnnot progress further.
We believe that the Seasonned and other Mobs title can be eventually reached by players.
Is this assumption right ?
If it's the case maybe the ranking system should be tweaked so as to let players progress further in it.
I'd be happy to have more insights here.