I've seen a post incident video from ground crew by the rear of the 321, quite an amount of the rear of the ac is out into the taxiway, so i'm surprised the 330 crew didn't see it. That said, if a crew can not taxi fully onto stand for whatever reason, they need to advise ATC soonest as they have now blocked the taxiway, simple. Syamaner, I see no ATC fault here, it is no issue for them to give taxi clearance to the Asiana if the Turkish has passed / is infront. If the whole length of the taxiway had to be fully clear, things would happen very very slow on any airport...