I know what you mean (though I like how the HT Han gloved hands grip his blaster) it's just in addition to it being maybe 10-20% too small overall, it's that the bottom of the handle grip only comes down to his ring finger whereas you can just see the bottom of the grip just below the little finger in that screen pic.
And this is with Luke, a slightly smaller figure/hands, so imagine this pistol in one of those larger DID type hands.
The SSC Luke Snowspeeder came with some ungloved Luke hands that are pretty small, so I may try those.
I know it's in his hand for a second or two onscreen, but I'm planning on doing the "pointing at Jabba promo shot" as my display pose. I may end up giving him the Hasbro version of that pistol, even though that one's slightly oversized.