I don't think there will be any retaliatory strikes against Iran. Doing that will only push India and Iran closer, and maybe even Iran allowing Indian assets close to Pakistan. However, Pakistan had to retaliate against India because....well, it's India. Both countries are mutual enemies and hell bent on destroying each other. The Pak military doesn't want to stretch itself unnecessarily, and keep the bulk of its focus and assets targeted towards India and its eastern border. This is a game of chess.
With Iran, there's no reason to escalate. In fact, the Balochi separatists are enemies of both countries, so I don't see why they don't work closer against these organizations. It seems that both countries will tackle them on their home soil, but allow them to attack each other. Completely pointless strategy.