Why not just allow us to use Tears to restore crystals, 1 tear per crystal.  Limiting the restores to an additional 3 will not be enough.  I have a guildie that quit becaues he used 3 in the first 2 months, an additional 3 would get him another 2 months.

If the restore process is cheap, unlimited, it makes it less scary and people will try the harder spots more, and use more tears than the restore slots ever will.