Bob
I'm interested how the information is displayed to you in a Hawk?
Certainly in the various aircraft I have flown fitted with TCAS the contacts sometimes have a habit of roaming around the screen a little. (Sometimes 30 degrees and a few miles in position)
In the TA phase of any encounter, in an airliner there are two of you to look out as you try to discern where the screen contact is in the real world.
Are you head down in the hawk, or is there a clever HUD integration?
I'm surprised that you find it generally positive in the Hawk, as in the military aircraft I have flown fitted with it, while it had it's undeniable uses, it was a pure irritation in RA mode.
There is the problem that RA is all or nothing. What I mean by that is that unless I'm mistaken, the system expects both of you to follow the RA and plans accordingly. If you choose to ignore it the plan is compromised. This means that military aircraft cannot opt in but give ourselves options to ignore if visual etc.