I here ye, loud and clear

. I know nothing about indian swords, so I prefer to listen for now, however here is something related to the question - it's understandable why some of the grips are very small, but why there are some classes of swords where the hilt is actually quite comfortable for a big hand:
Hand and a half sword (It was not really designed to be a two handed sword, was not it ?)
Katanas (well, they are two handed, so it's quite ok to use one hand).
Kindjals (you can have a very comfortable kindjal, but shashkas usually do not have a large hilt).