[Trexmaster]

From what I can tell the current 56 limit is based off the fact every 8 levels mobs can drop items 1 rarity higher. At 48 mobs start dropping 9 stars, so at 56 they begin dropping their 10 stars.

So it might be weird to lower the level requirement for only 10 stars. If we adjusted it to be every 7 levels rarities would unlock like so:

Level 7 - 4*
Level 14  - 5*
Level 21 - 6*
Level 29 - 7*
Level 35 - 8*
Level 42 - 9*
Level 49 - 10*

Looks a bit better and odds are the code change required probably wouldn't be that much since SURELY that's how it's all connected to one little variable (wishful thinking).

Another option is as stated in my past thread to raise the number of mob spawns of each level bracket as well as increasing the rate at which mobs spawn. Making for more possible mob kills per in-game hour. If not giving players the option to actively pump mob numbers through some cypelle exchange or similar currency dump.