As mentioned by others, IR will have to speedup the slot itself between NGP-NZM for any time improvement in this stretch. 2441/2 will not be singled out here.
But yes, NGP-BSP leaves a lot to be desired. It is currently on par with regular SFs. Deserves a shorter journey time.
Lastly, if CGSK and Raj departing on the same day from BSP, it is obvious that people will prefer CGSK. And this is what is happening.