Yes the game is set in the future... but let us look at other fictional precedents that may be valid -
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Firefly/ Serenity - (2500ad-ish)
Actually in my opinion a fairly close representation of the mentality that we should be adopting (just minus the crew for now). 500 years in the future and recovering from a bitter civil war in a distant part of the galaxy where the remnants of mankind have settled after using up all the available resources on Earth. One Man, One Ship on the frontiers of space, taking jobs and making trades as they go and never exactly knowing where they will get a good profit unless they have dealt with people before, or have been given the contact. Even Inara was unable to arrange business unless they were already in range or by a prior arrangement.
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Star Trek - All of them but most specifically Voyager
An entire series based on a lost Spaceship trying to get home that had no way of communicating with their base of operations for at least a couple of seasons. Even then the contact was initiated from the Federation that was drawing on more power than the USS Voyager could provide by itself to send the signals, and after all of that, they were limited in the amount of data they could send over that distance before the signal was lost. Would have saved 7 seasons worth of air time if they had arrived in the Delta quadrant and Janeway had just been able to get online and say 'Hey, we are the other side of the galaxy... how much will it cost to ship me some coffee?'
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Battlestar Gallactica -
Ok set in the past but with a technologically superior group of ancestors on their way to earth - Limited computer assistance in flying and plotting the courses of ships beyond one jump because of the way the Cylons had already screwed them over. On the communication front, between ships in close proximity, fine... but then there is the whole matter of the Pegasus... another Battlestar, unable to communicate until they were in range... not forgetting the number of times that the Recon teams could not deliver their findings until they were in the same system?
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As for the game galaxy?... it will take you less time to fly to a system, land, check the prices and move on, than it would to wait for the data to come to you. The Trade Map on the galaxy map shows you the most common flow of goods to give you a rough idea, but this is also going to be effected by the NPC trade ships that are shifting goods based on a Planets Supply and Demand, rather than just a Players motivation on 'what is going to give me the most profit?' This is the point of us being given Supply/ Demand Data... why would you want to load up with 100 tons of cargo to take to a planet if you have no idea if there is any actual demand for it? (I know the analogy is weak but this is like saying you would take 100 tons of Animal Meat to a Vegetarian Society and hope you would make a profit... trust me, the smell of a bacon sandwich is only going to convert 30% of vegetarians back at the most!) ... ok, maybe it would be nice to arrive in a system, check the prices on your cargo and then decide if you are going to sell there or move on... maybe this 'marketing computer' could replace another module? Ohh and you have to drop out of Supercruise at a Nav Beacon to actually relay the signal to the Local Space Station and therefore run the risk of ambush?
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As for the walking around stations, planetary landings and everything else, this is in the future and FD have stated time and again, The launch is just the start and that they operate under the policy 'If we are going to do something, then we will do it properly' so yes, the chance of your fishing and bear hunting fantasies being fulfilled is real, but Soon(tm). On November 22nd the Galaxy opens for business... enjoy the ride and wait to see what is around the corner, and have faith that FD will deliver. Some of us have already waited 30 years for this, a few more months as they iron out the kinks is nothing compared to that.