i made a mod named Show Perfects , check it out when you want . it highlights all matching sides of the neighbor tiles , not just the one touching the tile that the player is holding
i tried not to deviate from already existing code to minimize potential bugs , but there are two non-critical issues . 1st is that the very first tile in the session doesn't trigger the mod's code . and 2nd is that with track/river tiles that the game auto-rotates for you some neighbors are not highlighted on the first touch , but after that all neighbors are highlighted properly . i will try to fix that next time