Harvest disperser mob rarity visual improvement suggestion

I've been okay with it, but some people still have a hard time seeing Harvest mob rarity when viewing what mobs the plot will spawn in.

Here's a suggestion on how to improve that, which may be a better experience (especially for I think persons with tritanomaly(?) color blindness) or for persons with very high resolution screens.


Where mob rarity is:
Grey: \
White: X
Blue: *
Orange: O

Example Mock-up: