A Technical Solution to Cheat Detection from an Engineer

This is an interesting idea, but I don't think it's acceptable to opt out. Instead it should require you to pop one combat off the queue to be allowed to add one.

It should not take very long or require a lot of data, to transfer the random seed, the data of the involved characters, the moves played and then run the combat and return the result to the server for verification. Flag for inspection if different, and ban accordingly.

This is definitely doable.