I think it would be a good idea to make it so that you cannot reinforce disabled creatures. This is a way to slightly nerf Hixus and other disable creature supports without taking away their utility. The disabled creature would still take up a slot on the enemy’s board. It has always bothered me that reinforcing a disabled creature won’t trigger the creatures enter the battle abilities.
The biggest issue I see is that the AI doesn’t replace its own creatures anyway, which will cause its hand to fill up until the disable affect is ended.