No way.
The calibrating is fine, the only real problem is having to stay at the bombardier's position to drop it manually - this makes you have to switch continuously between the bombardier's seat and the gunner positions, which makes it difficult and dangerous for buff pilots.
From what I remember the Norden sites automatically dropped their bombs after calibration - there were two 'markers' that were set by calibrating the sight, where the bombardier would first 'mark' the visible target via the bomb sight, and then set the second 'mark' by calibrating the alt, speed and drift.
As the buff draws closer to the target the two 'markers' would gradually come close together, and when they were aligned the bomb was released.
Now, I don't think we need all that gadgets in AH buffs, but I think we do need the system which drops bombs automatically according to calibration - so, in a bomb run, the bombardier can set the sites, calibrate, and then jump back to defensive position - as long as the buff holds a steady heading and speed, the bombs will then drop automatically.