I agree. Perhaps either:

A-Make the time given to roll not so god awful long
B-After a chest is opened give players the ability to votekick ~20 seconds or so
C-If you ignore a resurrect you will be automatically booted
D-Create low participation requirements for individual roles such as
-DPS for fight is lower than 50= you cannot lot
-HPS for fight is lower than 50= you cannot lot
-Tank DPS for fight is lower than 20= you cannot lot
E-If you are locked out of X amount of fights you are automatically booted

There are more ideas out there, however maybe a combination of those and these ideas would be helpful.