Generally, a misclick isn't a reason for an autosave, I think everyone understands that, so the right to grant an autosave remains with the opponent. I would grant an autosave without any problems if it's an obvious misclick (i.e., it's clear that a reasonable person wouldn't intentionally make that move). Also, the issue of autosaving should be resolved immediately at the moment of the misclick, i.e., either we play and accept it, or we immediately autosave. The option of playing it out and then figuring it out later is nonsense.