Towards an interest of fairness here, in these recent months India has looked abroad for options in countering their potential deployment within mountainous border regions, and importing some existing light tanks from Russia could honestly do just that.The thing about the design of Type 15 is that while it does have a weaker firepower and armor protection than heavier MBTs, it can go to places where normally a heavy MBT couldn't go, like high up on the Tibetan plateau or in the hilly and watery regions of Southern China. Just as the Chinese military strategist Fang Bing once said about the Type 15: "Those that can defeat it can't go to places where it can go, and those that can go to the places it can go can't defeat it".
Securing a proper deal will likely take many years at least, but if their leadership really becomes desperate enough this option for importing new armoured vehicles from Russia could eventually be activated.
The weight of 2S25M Sprut-SDM1 light tanks is roughly half of Type 15 main battle tanks and has the added benefit for India of not complicating their armament logistics by utilizing a similar 125mm gun along with the exact same ammunition as T-90 main battle tanks.
I am no way saying these armoured vehicles will be equivalents of course, but they do in fact have a capable gun despite lacking capable armour, which might not really matter when tanks become glass cannons if they face each other directly anyway.
Now the main question I have would be regarding their mobility in high altitudes, which could indeed be lacking just like T-90 main battle tanks, especially given its relatively low horsepower engine and no special turbochargers or compressors.