Maybe it's worth mentioning in the rules what a 'mini royal' is.  I didn't know, and had to look it up.

Apparently, "A Mini Royal is a suited AKQ".  Plausibly it could have included suited KQJ and suited QJT, given that a regular royal is suited AKQJT.

It looks like you've picked the most favourable paytables listed on wizardofodds.com for your game.  I see they mention a variant where the player wins in the event of a tie, which gives about 0.13% less edge to the house.  If you're looking to give better odds while still offering a vaguely standard game, that might be something to consider?  But probably three card poker is rare enough in the Bitcoin world that you don't need to compete that hard.