The proliferation of sensor and communications technologies is likely to make combat shorter and increasingly deadly.

An interesting analysis of historical (and possible future) air-to-air combat can be downloaded from here:

http://csbaonline.org/wp-content/uploads/2015/04/Air-to-Air-Report-.pdf

I think there's lots of applicability to Traveller.

At typical Imperial tech levels, every object in a star system will be tracked or have its gross characteristics (size, signatures across the EM spectrum, orbital elements) readily measurable.

The defender will have a big situational awareness advantage over an intruder as a result.

Rob O'Connor