[Andrés]

This would require hard-code changes, but it would be nice if missiles would start moving when they are launched. If the target is within movement range, and there's no PDC involved, there would be no different between a seeker and a direct-fire weapon.
But going back to what is possible, I agree with Oleg, increased seeker speed would be nice.

Increase renge of WMG like in SE3.
And this would screw AI, but it would be nice if different high-energy weapons would not only have different comp families, but also differnt weapon families allowing AI modders to decide which of them they want their designs to use.