They've already added content to this game without adjusting the level cap, so they can certainly do it with this content as well. Of course they can choose not to, just as they can choose to do a complete gear reset and make level 53 quest greens better than anything in the game right now. Which is fine, I have no problem with either of those things and I don't think either would damage the game in any way. I just don't see how increasing the level cap is necessary when this game is intended to be story driven. I'd prefer it if BW focused on telling the story the best way they possibly could rather than worrying about what adding 5 skill points will do to class balance.