Speed will make only a very small difference. Your analysis is correct, except why do you wish to unload for the drop? And how steep a dive angle are you speaking of?
Regarding the unloading, I was trying to take away as many variables as possible, is all.
But I don't really see how the pitch ladder will have any effect vs a fixed reference point for the angle.
HiTech
The scenario I'm generally thinking of is where your view forward has no horizon in it. Wherever that starts.
Pretend someone's successfully intercepted your jabo dive early on. You came in at your known alt, you started your dive when you wanted to, but somebody in a good diver was right place, right time to get on your six 400 out. You keep your eggs, do pilot stuff. He got on you around 15k and you get him to pull off with your alt being around say, 8k alt.
My point is, due to the defense you just had to do, you're in a relatively unknown position above your target now.
To reset, you now need to get back to a glide path that will allow you to hit. Just for grins, say you're surgical with a bomb at 45 degrees. You've got an excellent point of reference on your gunsight glass to use for exactly where your bomb will hit.
Without the ladder, you've got to take your eyes off your bombsite and target, use whatever point of reference you need to to get level, then get yourself to the appropriate distance from the target to line up whatever marker it is, either nose geometry or monitor to turn in for your 45 degree run.
With the ladder, you can do whatever you want to to put the target on the 45 degree angle, you've got a perfect frame of reference that will allow you to get there from any orientation you want without taking eyes off the target.
You can hit that angle coming out of any maneuver you like as long as you get that angle and aren't pulling G's when you release, you've got the same point of impact as if you were unmolested for your entire run in, all faster and with less effort on your part.
Could a guy that's good at it judge the angles by horizon and feeling do it as quick? Likely. All I'm saying is the ladder takes out a bunch of the steps the guy who took the time to become good at it needed to do to get there. Now it's merely a 2 step process of align target with appropriate holographic marking, obtain sight picture and release.
Not exactly game breaking, but I do think it will result in significant gameplay change. It will be harder to throw a jabo off his game if he chooses to try to survive your defensive attack.
Wiley.