(BTW, adding an option for auto-rollback wouldn't change my opinion about that. Not all side-effects of a query can be rolled back. Thus, if there is an auto-rollback option, it mustn't be GUC-adjustable either.)
Yeah, I've worked myself around to that as well, this thread's proposal would be to just make setting up rollback more obvious and easier for a user of explain analyze - whose value at this point is wholly independent of the GUC discussion.