There is already another Map region done and more weapon types expected potentially by end of year
My friends and I have been talking about the level 30 rut in this game since it released (and this was feedback that they got in beta
constantly). By level 30 you've seen damn near everything the game has to offer. The enemy variety is awful, you have access to all of your weapon skills by this point, and the armor/weapon skins aren't diverse enough (nor is there a wardrobe function to let you preview higher level gear) to add meaningful goals. Even crafting requires a shitload of the basic materials that you get from the early level zones.
As it stands, the base of the game is acceptable--even good--but there's just no meat on these bones right now. Even the PVP doesn't change much as you progress through levels, the only difference is that at level 60 you gain access to the battleground equivalent of PVP so you aren't relying on open world or wars.
New zones and new weapons aren't going to change much because the first real rut hits at the middle levels of the game. The challenge is going to be retaining players to the cap that takes a while to achieve. You'll be doing the same thing for a very long time. There's a reason most, if not all, MMOs have long term character-based goals. Once you run out of noticeable progression, it just gets boring. Even the grindiest of games maintain that progression system as you advance.