Sometimes, Traveller works on a huge scale.
And sometimes, small-scale stories are the thing to do.
I suggest that the small scale is best for most groups: the huge scale of the Traveller universe is kept in the background most of the time, with a few peeps behind the curtain every so often. Otherwise, the sheer scale becomes intimidating for most PC groups.
Then, there are those PCs groups that aren’t intimidated: not by size, not by complexity, not by 10 trillion sophonts going about their business, each with their one plans and dreams. Those groups can get the best mileage out of the Imperial setting, and Traveller in general!