since DRDO is also handling zorawar, we have to assume they have already made a conscious decision to split the design between light tank and armoured vehicle(wh and tr).
my personal view, it's better not to give more options to tareeq pe tareeq type customer like IA. IA seems to have some internal issue when it comes to taking decisions on time. the amount of adjustments/changes the entire system at national level had to undertake for IA to be in a comfortable position to take decisions has been a mind boggling journey.