Will a player be able to advance doing only PvP or only PvE?
A. Yes. Naturally, as the game depends on both your and your characters skill, you can’t for example PvP-fight for a year and then suddenly know all about how to aquire Egg-Mussle Shells from 60 meters depth outside the Tindrem harbor. Likewise, spending all your time in front of the blast furnace won’t give you an advantage on the battlefield (except possibly from your gear).