[Very_Good_Karma]

The post is a bit jumbled but I think you've summed it up nicely. (Add some indents, white space and bolding. It's verging on tldr.)

I like the last category a lot. "Multiple Changes", "Facial Changes" and "Removal Of Imperfections" are especially great hallmarks. I'd add "Limited Degree of Transformation" as IB transformations tend to be relatively subtle, because (as you said) if they take any one attribute too far they belong in another category.

Actually, it's quite possible to imagine an IB story where a character achieves Glamour Overload and people that look upon them are automatically enthralled. But then again, if it goes that far it's really more Mind Control. So yeah, IB is all about balance and moderation.

Are there any other terms this has been going by? I used to see writers who explicitly included Butt Growth in their BE stories while keeping waists narrow self-label their work as "Hourglass". Do we even have a name for waist narrowing?

Personally I think IB is an excellent term, as it covers a broad range of transformations and is an unused abbreviation. (I really get sick of seeing HG, HG, HG, BE, BE, and BE all used at once on story sites.)