I think you missed the part GVHM is a lvl68 dungeon, so good luck to leveling your
With xp from vanguards will take less time then the patch we had ( no xp ). So i think 3 weeks should be enough to level up to 68.
This is what to be expected from coin system. Saw it coming but cant oppose and dont have any right to give any opinion. So what can i do is react, thats all.