I actually thought that last drive was pretty good. You cannot blame the game for the user play calls and only going zone. My only gripe is that the play clock was nearly zero and Seattle did not call one timeout. I do not think I have ever seen a drive that went the full length of the field with as many plays that it took and there not be one timeout called when there were 3 at their disposal.
By about play 10 there is usually some confusion with no huddle plus the guys are exhausted. The time in between plays should get a little longer after each play to account for exhaustion and the extra communication required to relay the play to each player.