I think the 12 you're going with just about covers it, brilliant!
Also, the ones you have chosen to eliminate is a good decision. I think it's true that the slimmer figure will look best in this outfit.
Is going with the base V4 as the default still an option for you Connie, or are you staying with the GND4? I don't know how this will change your workflow so I'll shut up if it's going to cause problems!
From a personal viewpoint I like to mix morphs but I don't know what percentage of people who buy this outfit will? I guess you have to take into consideration what the majority would go for.