Idran, you say they are out for 2 weeks, a month best. If they only have a range of 2 weeks -- even at top warp, not much they can explore since the ship is "tethered" to the space station as it can only has "2 weeks worth of gas/supplies" as it needs 2 weeks to get back, and probably less as that would be cutting is close.
Yeah, but keep in mind, they cruise at TNG Warp 9.4 according to Mack, which an earlier poster in the thread said was the equivalent of TOS Warp 12-ish, compared to the Constitution's cruising at warp 6.
Also, they aren't meant for exploration, they're meant to go to specific locations to check them out. They don't go out unless they have a specific destination in mind.