I think that because people hold hooks differently, i.e., overhand or underhand, different types of hooks are needed. I hold my hook like a pencil (underhand) and cannot use the Clover or Addi comfort hooks---or any hook that is not straight. I hold my hook closer to the head, so the comfort part gets in my way. I've tried a couple of times to crochet overhand, and I just can't get the hang of it.
I bought a beautiful-looking wood hook by Laurel Hill that I detest. There is no end to the throat. What I mean is, it tapers from the head all the way to the thumb rest. You can't determine the size of the stitch. Here's an example. So please don't make them like this. You need a place on the hook to work your stitch the correct size. I hope I'm making sense.
I like the Bates hooks; I find that Boye hooks split the yarn, and it takes twice as long to finish a project because I keep having to redo the stitches.
Also, please be consistent about the size of a G hook. They will be in different sizes based on the manufacturer, all the way from 4.0 to 4.5. I've actually found one that is 4.25. I believe the correct size is 4.0. I was working with a Clover bamboo hook and the yarn was not right for the bamboo, so I went to get my Bates. The two hooks were obviously different sizes so I measured them. Sure 'nuff, the bamboo was 4.5 and the Bates was 4.0.
I'm intrigued by the idea of a detachable head system, but again, I don't buy hooks with the comfort grip.