They contribute to a ship fully and equally integrated into surface ASW group steaming/combat formation and its CIC infrastructure.Destroyer level sensor and armament don't contribute much (or any) towards ASW capability.
I.e. they constitute significant part of what makes it a combat ship.
Adapted Iran-style flat tanker can be bought for a price of 056a.Also 075 has the price of a frigate.
It will, however, probably will be a complete mess to operate.
075 is between those two survivability points - which is a very doubtful deal when you're fighting US(UK?JMSDF?AUS?) underwater threat. Both for the crew of the ship and those trying to keep it alive - at expense of their own lives.
It always, always shall be remembered that WW2 at sea literally began with the sinking of an unsuitable ship - full fleet carrier in that case - trying to do ASW.
p.s. and yes, we don't really know true price of the 075 - especially when filled with ASW airwing.
Ships aren't lego. And trying to retain hull optimized for all wrong things for ASW is just weird honestly.At most you swap the dock out for more engines and makes it faster but speed is hardly a factor when its main ASW tools are helicopters.