If I were in charge of making Stronghold a top-tier-robot-only game, I would:
Keep the tower strength at 10, as at Championship.
Keep all the defenses. (Heck, if we can design for the drawbridge, anyone can–and if they didn’t, that’s really their problem, isn’t it?)
Get rid of crowd selection and choose the random defense with a coin flip. (I might just be grumpy that they institutionalized a built-in penalty for having a small team.)
Change it so that any boulder that has contacted the carpet of a secret passage must be carried over the outer works to be scored (as if it had come from the neutral zone–so no more scarfing up boulders from your opponent’s secret passage and immediately scoring them, though loose boulders in the courtyard are still fair game).
Change a breach to all five defenses.
I would be adamantly against changing the breach/capture QPs–robots were designed with those parameters in mind, and it would be too significant of a change at this point. As others have said, it adds both tactical decision-making and end-game excitement.

