Getting checked after being hit on head is definitely needed. But more important than that is to improve protection. If ball hits the lid either on the top or on the grill, why are they still getting concussion injuries, it means helmet protection is still not where it should be. Also high time, need to start thinking about how to protect bowlers getting hit on their head/face in their follow through. They don't even have the helmets under which batsmen are getting concussion injuries.