I just tried the "EditSizeMenu" you posted for me and it made your point. It did Exacly what I like for the "SPHERE" but for "Cone" it was not the appropriate dialog. I preffer the original one. Same for all the others that you could mention. The only solution would be to have the multiple options for multiple tools for multiple user prefs.... I see the logic and wouldnt change it.

Burr