IMO, this is a very beatable game. Table selection is critical to maximize profits. While it is true that many people at this level do buy in short, looking for tables with lots of money on them can reap profits. Many of the players at this level are recreational, however, you will find some that are regulars.
Continuing to work on your game and trying different styles are things I would recommend to continue to be successful at this level. 2/5 does play differently, however, opponents at the lower levels in general tend to play either too tight or too agressive, so adapting to your opponents can be critical.
Moving up should be your goal, but only after you have proven yourself at this level. Begin to record hours and win/loss amounts to ensure you are ready. Also, bankroll management is critical, as your limited roll can experience a severe downswing. I would recommend that you build it up prior to continuing to play 2/5, as $2000 is grossly underrolled for this level.
Good luck in your endeavors...