I know... problem is how to do this without making them uber 1vs1.
Improving current level 9/10 missiles will do that.
If you add speed they will be simply too fast/good when fired with thruster.
What about making new missile with some 1500 damage (firestalker has 2400), but some 200 speed a better tracking?
With some balancing it can be made to be "support missile" in larger fights (like shooting guns(or thruster) off a bomber that is attacking the capship you are defending).
1vs1 it will still be better to go for the Cannonball and in mixed scenarios with Firestalker/Sidewinder.
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Another thing that I noticed in FLstat is:
Seeker forward degree
From the name it seems it's the angle where the missiles "sees" target.
All normal missiles have 35
CDs have 90 - 135
This value could definitely be increased a bit.
Igiss says: Martin, you give them a finger, they bite off your arm.