granted, yes, but it's also a thing that even original Mk1 design was meant with 1500 bhp Leopard 2's engine in mind, that didn't simply happen because US Embargo over its supplies that (then) West Germany had to follow...we eventually got 1400 bhp engine that was going to be put in some Leopard 1 upgraded prototype with a transmission that is said to be used in heavy trucks - so it was already underpowered a bit; and now with further weight on it in Mk1A design it's burdened further
and now same Germ-many is arm-twisting us with supplies of same engine
if anything, that DATRAN 1500 bhp should be put in place of that german 1400 bhp thing first in good numbers; FMBT project is already going nowhere with not even first prototype out; but by times it happens we at least would have a mature engine for it with experiences from Arjun
alternatively I was even arguing in favour of putting HTSE-1200 that's got shaft horsepower of maximum 1600 some, with some configuration perhaps it could be used on Arjun line as well, like how Russians and Americans put turboshaft engines on their T-80 and Abrams line?