Skip to to the 10:00 min mark for Sulu's history lesson
So my idea of a space opera setting is one where things like cutlasses and revolvers are antiques, not standard issue. If characters have weapons they'll be things like force blades and lasers. But in OTU the lasers that are available are cumbersome weapons that require a bulky external battery to use.
That's the kind of weapon that would be more at home in the near-future of Cyberpunk 2020 than in a star-spanning interstellar empire where anti-gravity tech is common. As for laser pistols, forget it. They didn't show up until MegaTraveller. I'm not sure why Miller and co. decided to go this direction, but maybe it was to make the game seem more realistic. Or something.
This isn't a major problem. Creating your own campaign setting is part of the fun of gaming. And it's relatively easy to come up with some house rules for laser pistols and such like. But there are a lot of little things like this about the rules that are sticking points for me. Traveller is a game I want to like, but it takes quite a bit of tweaking to get it to where I want it.