The Bombsight is easy to do "IF" you are a steady hand and you have decent equipment. And as Mak said, practice till you get the hang of it.
The Problem is if dont have a steady hand, and cant find that sweet spot when pressing and releasing the button, your not going to have much success bombing. Yes I do realise its the begining and ending point but if your eyes are poor and you have the shakes, it isnt going to happen.
The other side is if you have a crappy stick, it has a big effect on it very simular to being unsteady. I can make perfect calibrations on my good CH Gear, but I cant do it with my old cheapy crap.
A Good Comprimise would be this. Replace the moving the cross hairs to find the sweet spot with a simple button that must be held for 2 seconds. Here is an example of what I mean.
First you get up to Alt and your Speed. You would open the clip board map and select your target, just as now. open your doors and make sure your speed has stabized. Now instead of holding the cross hairs, you just hold the calibrate button. Make sure your delay and salvo is correct. Your set to make your drop.
Now if you have a radical change of coase or change your speed or altitude your drop will be screwed up, just like now. Bomb drift and despertion is the same as now as well.
The only thing that changed was way that did one small step.
If possible I would have a checkable box in the flight options, so you could use the current system or the easy calibrate.
This would not effect those with good skills at bombing, But it would make it more fun for those that are having a difficult time with the cross hairs. The Plus, More Fun for Everyone.