I can totally see that as a viable and interesting setting but Traveller came out at a time when Star Wars was very much on the mind of most gaming aged customers. Plus, it said right on the cover, "Science Adventure in the Far Future". In 1977 the 'Far Future' didn't have bullets and slow FTL drives. I grew up on Ringworld, The Forever War, The Stars My Destination, Lensman, Retief and many other SF books just as much as TV shows, comics and movies and at first glance Traveller seemed dull and flat by comparison.
It’s funny. Back then, I was heavily into science. The sci-fi I did enjoy was the stuff that was more grounded in science. So, a future with bullets and slow FTL was more attractive to me.
Sure, I liked Star Wars, but it was always fantasy in drag to me. No need for a sci-fi RPG if I want to play something like Star Wars. (OK, not just fantasy in drag. Also WWII and Kurosawa and...)
But then, I guess I knew I was weird in that respect even then.
On the other hand, there were some pretty gonzo Traveller campaigns I’ve read about. Change the time for jumps to be based on distance and whatever rate you choose. Call the blades “lightsabers”. Call the slugthrowers “blasters”. And you’re well on your way.