The problem is the game does a poor job of explaining this. It's only mentioned in the online manual and not anywhere within the game. This information should probably should pop up in one of those tips upon entering sector space, because most people don't look at sector space as astrometrics and are subsequently disappointed.
My first impression upon seeing it was "Star Trek : Miniature Golf Park". Once I found out what Sector Space actually represented it made much more sense. However, I would still prefer something else, like showing a warp display on the viewscreen while giving us some time to roam around the ship's interiors conducting productive tasks (like a mini-game during travel, which maybe result in you acquiring certain performance buffs once you reach your objective).
I do agree with others that this was their best opportunity to let us command the ship from the bridge interior (for a change). The only thing that would really be needed is a proximity alert for when enemy contacts come within range so you can toggle out to the normal ship/astrometrics view.
Sector Space should be seamless and ten times larger (then speed up ships to keep travel time the same). This would make the galaxy actually feel large.
The Andorian is absolutely correct. A game based on exploration should never be limited to instancing of any kind that boxes up the gameplay. Having to warp between these spaces fractures just puts a needless limitation on you.