It is tricky getting used to a different set of controls - but it brings a really fresh new feel to large ship combat.
Beyond this, any ship that is being pursued would draw some benefit from this mod. Here are my more specific comments after flying around for a bit:
1) whilst ships gain an defensive advantage in being able to turn and shoot at the same time - they run an increased risk of getting 'lost' in combat. It would be riskier using this type of combat whilst trying to make a dash for a safe docking port.
2) That being said, in a furball it would certainly increase the challenge of snub versus cap, and cap versus cap fights. Broadside firing looks simply fantastic, as does the ability to position your ship on its 'good side' to the enemy.
3) Ships with shadows in their firing arcs are still vulnerable - but attacking ships will have to work harder to stay in the enemy's shadow and avoid return fire.
4) Larger, slower ships (particularly BS) get less of an advantage with this type of mod - but they still stand to gain some benefit. A BS in particular can use this to change their vector of travel. At long range, changing vectors even slightly can cause SNACs to miss their target - whilst the BS can continue to fire on their enemies.
Attacking ships will have to get in closer to negate the BS ability to maneuver - thus exposing themselves to the BS return fire.
5) Using this mod with fighters isnt so effective - as using the keyboard to turn is nowhere near as precise as using the mouse. you can only tuen in one direction at a time - so no diagonal turning is possible!
In addition, the ability to turn in this way is aborted when your ship nears a vertical angle. You then have to reset it by tapping in and out of turret view before you can start turning again in turret mode. This 'freeze' in a fighter fight would be highly damaging, if not fatal!
In conclusion:
If it were implemented immediately - the ships that would benefit most are those with reasonable maneuvering and good turret coverage all around the ship.
All ships would gain some benefit from being able to turn whilst looking backwards or sideways.
I say it is worth the effort that may be needed in rebalancing.