I have spent some time in the Corsair, an found that it's a decent combat ship. What I have found is that like the FdL/Mamba the Corsair is super sensitive to throttle control. Venture outside of the 'blue' zone, and you can get dogged. With the throttle set in the blue, and with considered use of boost, keeping on target is much easier.
I use 1x C3 + 3x C2 Efficient Pulse Lasers (3 w/ Phasing + 1 w/ Scramble), and 2X C3 Overcharged Cannon (w/ Servos). Stripping shields: Check. Burst damage sniping the PP: Check. With 3 pips to Weapons, I can pew nearly for ever.
The Corsair is not as good for combat as the P2. That's good. When I'm headed to a CZ, I'm in the P2. The more combat focused ships in CZs add too long of a TTK compared with the P2. But, for the more sedate fighting in a RES, the Corsair does just fine.
I can't say I'm disappointed by the Corsair. It's an All-rounder, not a combat focused ship. I find it excellent for it's intended purpose. I can fly around in a ship w/ 224 units of cargo space, a limpet controller and a space buggy, all the while capable of dominating a Haz Res. Who could be disappointed with that?