Unfortunately being good / not authoritarian and economic outlook do not go hand in hand.
India has been the fastest growing major economy since it started aligning with the West and embraced the Western capitalist mantra.
Even with profound income inequality, the living standard for the average person in urban India is completely different from 10 years ago.
I doubt that rate of growth changes anytime soon with or without Modi.
The Berlin Global Dialogue was a few weeks ago. The CEOs of Airbus and BMW were gushing over entrepreneurial spirit in India and India's demographic dividend (having more young than old people) which nearly guarantees economic growth over the next 10-20 years.
Economists globally have estimated India will be a high income nation by the late 2040s on its current growth trajectory.