Bro, Being Heavier is the choice of brain team since they believe on benefits of heavier tanks compared with 45-50 tonnes equivalents. Israeli Merkava are also following similar ways on developments, since Each blocks of Merkava revealed with additional weight and Finally, They reached around 65 tonnes on MK-4 series(3-5 tonnes additional weight). It is more or less same weight of Altay. I think Heavier tanks will be better for Pakistan as long as They are not used on soft and highly mountainous grounds. IFV's equipped with heavier calbre guns/having less pressure effect under the pallets are more suitable for such mountainous regions.