No, they certainly couldn't afford to be slowed down -- though they might be if one of them got hit by friendly fire, which very nearly happened as Sasuke ducked out of the way of a flying shinbone from Draco's undead victim. Rikka spoke before he could, which meant that Sasuke instead turned his attention to the nearing door, now: they could wreck it and end up with zombies pouring after them en masse, or they could try to break in and shut it on the walking dead behind them.

It was entirely likely there would be more zombies inside, but at least they wouldn't need to be constantly checking behind them if they could close out the ones by the shore. And it would give Draco a function other than dangerously exploding his enemies.

Turning even as Susano'o swung through a group with its chakra sword, Sasuke reached back enough to grab Draco's shoulder, pointing at the huge doors: "Your job is to get that open. We'll cover you."

He'd meant it when he'd told Draco that he'd be aiming the wizard at locked doors.