Once it will get LHB rakes then it's TT may got change. Right now it's being stuck in with slots for High priority LHB trains having higher MPS than this. That's why.
When it gets LHB rake the mps b/w ET-NZM will increase to 130 kmph resulting in change in schedule but let's not expect any extraordinary speedup. It will get a respectable TT but not very aggressive.