Good post.
One thing I've pointed out before, and will do so again (just for anyone not having read it before) is that there is no definition of 'what is suitable for (or compatible with) our atomizers'.
Bottom line: avoid oils and sugars.
I'm not convinced on the 'colorings' argument. There's never been any type of anecdotal evidence one way or the other on them. Kate chose not to use them based on her speculation, and that got treated as gospel. I've not had any problems with them.
Your mileage may vary.
Here is a site that addresses "colorings" FD&C Red Dye #40 Information, Education and Discussion. I too was iffy about using them, but I don't have a problem with them since reading from this site.