Well, who is to say they don't all have TAS? Considering the threat environment, the PLAN's current strengths and weaknesses, the ships the 056 are replacing as well as the design choices (just look at how high the aft is, they could easily have design her with a deck less under the helipad and easily been able to put a full helo hanger on her), it always made perfect sense to me that they were designed with ASuW as a primary concern, and TAS would have been a big priority.
Considering the speed that these ships had been pumped out, I seriously doubt that a major redesign had happened. That means that either the 056 had been designed from the start to have multiple versions for different missions, or that TAS had always been present. The dedicated TAS hole is far from some mandatory requirement when they have that big ass round hole pretty much in the same place.
I know they are for mooring lines, but you don't need mooring lines when you deploy your TAS, and your TAS should not be deployed when you need to use mooring lines, so I just don't see why the two cannot share the same hole.
