I know that after SC VSG express introduction they will cancel both link trains and Amaravati express LHB conversion is planned this financial year don't know about TPTY VSG express.
But treating SC VSG biweekly express as compensation train is not correct there was always a demand for dedicated Hyderabad Vasco train and those two link trains were infact compensations for not fulfilling the demand. Running those two link trains did not require additional slots as they run combined with Amaravati express and Tirupati express but now Secunderabad Vasco biweekly express will require additional slots so it should be treated as a new train and the compensation link trains would be gone for good.