That problem is not almost as strong with other humans being simulated, I'm not sure considering same pattern=same person makes it notably worse.

Additionally if I had strong reason to believe that my decision to surrender was not in some way entangled (even acausally) with their decision to mass-torture simulations, I may surrender in either decision, since I don't see a strong reason to prefer the preferences of the real humans to the simulated ones in the least convenient possible world.

However, in general, it's handy to have a pre-commitment to fighting back as strongly as possible on these kinds of blackmail situations, because it discourages use of extreme harm being used as leverage. If I think that my disposition to surrender would make those tactics more likely to have been used against me, that provides a basis to not surrender despite it being "better" in the current situation.

I don't think it fails intuition quite as thoroughly as you're suggesting, but I take the point that good examples of how it works would help. However, real-life examples are going to be very hard to come by since fuzzy pattern theory only works differently from other common identity theories in situations which are not yet technologically possible and/or involve looking at other everett branches. In every normal normal everyday scenario, it acts just like causal continuity, but unlike causal or physical continuity it does not fail the consistency test under the microscope (and, in my opinion, does less badly on intuition) when you extend it to handle important edge cases which may well be commonplace or at least possible in the future. The best I've done is link to things which show how other ways of thinking about identity fall apart, and that this way as far as I have been able to tell does not, but I'll keep looking for better ways to show its usefulness.