The longer we wait the bigger the response will be. Whether Iran wants it or not, they have to respond in a huge and disproportionate matter. A couple dead Soldiers or a couple destroyed bases is not going to do it. The hardcore supporters, for instance Hezbollah in Lebanon says they are waiting for orders to avenge his death and would gladly become martyrs avenging him. In Iran everyone wants revenge. The militants he trained in Iraq wants revenge.
If IRGC don't do something big and unlike anything we have ever seen before, they will lose support of not only regular people like me and other Iranians, but also important followers like Hezbollah fighters. Wether they want it or not, they have to deliver something huge