I guess I'm not sure what dolphin diving refers to. I will run-jump-prone over sandbags or other cover if I'm low on health and taking fire. Is that Dolphin Diving? I always think of it as guys who constantly jump while they are prone and go prone in mid air again...repeating this process over and over. But the new patch doesnt effect me at all, I never hopped or tubed or tossed C4. It seems like some animations have slowed down a bit.