I was wondering what effect FTL communication, Star Tek style would have on a Traveller universe.
Well, many see Traveller similar to the Age of Sail. Communications == Speed of travel.
With FTL communications, it would boost up to basically just before WWII. Before wide spread air travel, but in the age of radios and telegraphs.
The integration of markets would be possible, but hardly complete. There may be cheaper things available in the core worlds, but transport becomes a larger percentage of the resource cost. So, closer resources tend to be cheaper. Especially in times of immediate need.
I don't buy the loss of piracy. Authorities may well know that something is someplace instantaneously, but it still takes them a week (at least) to get there. And if the authorities have that kind of instant intelligence, the pirate can too.
We have instant communications today, yet we still suffer from pirates. The first responders (aircraft) can't really do much about them, save attack them, assuming they arrive in time. It's still a big world even here, space will offer even greater challenges.
There will likely be a level of centralization in terms of power. No doubt the rise in centralized power today is partly due to instant communication, but the Imperium is still too large as communication is only half the battle, enforcement remains as well, and for enforcement, you need presence. So, that means an expanded imperial effort far beyond what they have now with the feudal system.
And, of course, if FTL comms is just "faster", not necessarily "instant" (i.e if there's a real lag between the Marches and Core, for example), that will just exacerbate things.
Finally, there's is simply the complexity of the Imperium. It's to damn big.
Take, for example, when those Somali pirates were shot after taking the frieghter, and the captain (I think I have this right). The way the story goes, the President gave the order to take the shot. That means the President was in the loop, instant communications, monitored by a staffer, and he was able to react and respond in a timely fashion.
Obviously, he's not doing that for every engagement in, say, Afghanistan. He's far out of the loop of the ground activities there.
The point being, there will always be delegation to lower levels of management of some form. The faster the comms, the easier it will be for the people on the scene to delegate authority back to a central command. But at the same time, the more that happens, the less capable the central authority turns out to be if the volume of such things overwhelms that authority to handle the traffic.
So, FTL can be "game changing", and it would be interesting to see it "introduced" and watch the effects of it bubbling through the galaxy like the internet did here. But I can easily see much of what we view as the Imperium today still retaining a similar structure.