I understand where you are coming from and I also prefer the standard G configuration as well. We went with the conversion lever configuration for several reasons;
1. It allows users to convert back to an F model if they choose to do so. I have had several customers have their gun converted back to F models for their own personal reasons. Not possible with a true G slide.
2. It is a much more robust part and design. The true G levers have very small role pins that hold in a stamp steel left side lever that is also prone to breaking.
3. It left the model open to future designs for future levers that Beretta may be working on to be compatible with the standard F slide. Beretta is trying to streamline the process and standardize.
4. It is much easier to work on the conversion G lever from a maintenance standpoint. Some people find the G lever a challenge to assemble and the right side lever spring and plunger are prone to high velocity esacape to the carpeted areas of your home, to never be seen again. I keep extras on hand for that very reason. As many times as I have worked on the G guns, every once in a while one of them gets away from me. Normally it is not even worth looking for them as they are very elusive. (and here come all the experts that will tell me to put the slide in a big ziplock plastic bag so that it does not happen)
So again, "the gun is almost perfect and I would buy one if it had" ...... all black parts, a threaded barrel, it was inox, it was flat dark earth, it was a real G, it was a Vertec frame, it had a rounded trigger guard like the Wilson gun, it had night sights, it was a Centurion, it was a compact, it was in .40 S&W, etc.
Maybe one day I will get it right.