Star Trek Online handles this pretty well. You have a third person view of the ship and you can rotate the camera in all directions, like Josh has shown in his videos. Too look behind and in front of you is actually very easy and quick.In all of the space combat games that I have played, the optimal attack is to line the enemy up in your sights (they are in front of you) and keep them in your sights, blasting all of the time. If the enemy is behind you (and thus might fly into your mine/grenade) then you're probably Doing It Wrong™. Even then, getting them directly behind you is very difficult (especially when you are looking forwards). Either you need to be guessing their position or you need to 'switch' your viewscreen to rear-view mode, in which case you're flying blind and can't see what you might crash into.
In that game they have forward weapons and aft weapons. My strategy is to blast the other ship as I'm heading towards them when I get too close I turn around and continue firing at them with my aft weapons. I do agree that mines are fairly useless in space sims, in STO the ships don't fly fast enough to play chase. Typically both ships are sort of flying in their own random direction. occasionally you get stuck flying circles, orbiting a central point consisting of your exchanged weaponry fire
But regardless, I definitely agree with having weapons on the front and the rear of my ship, at least with the smaller fighters. Realistically carriers will probably have large turrets that can turn 360 degrees, I'm not sure if all weapons are going to be on turrets in this game regardless of your ship size...I am getting off topic here though I think...
But long story short, I agree that mines don't usually serve much purpose in a 3D environment but I disagree with having difficulty seeing behind me in a space sim