As someone from the Hindi belt, I feel like our language gets treated as a burden to 'impose' rather than what it actually is -- the language most Indians already shared and understood even then, and adopting it fully at independence could have given the new nation one unmistakably unifying voice from day one.
The Constituent Assembly's own fierce 1949 debates over the language question, which nearly derailed the Constitution's drafting entirely, and the violent anti-Hindi agitations that followed in Tamil Nadu through the 1960s, show the multilingual compromise wasn't a missed opportunity but the only politically viable choice that kept the young country's south from fracturing away entirely.