64 grids do work. However you can’t get to some of the different rules selection that occurs on the right side of a 128.
Push would be nice, however I believe it would require a complete rewrite of the device to work with the midi specifics of the push user mode instead of the grids osc messages.
There used to be a push max for live kit that would allow you to access different parts (screen, encoders, matrix buttons) of push without having to go to user mode…i never got very far with it though.
Since we’re talking about wishes: a 16 x 8 push with encoders like the arc.