Remove unused Styles

Whilst the Styles have improved development, I have some big frustrations when using them.

1. You cannot tell if a style is being used or not, and therefore it is not easy to remove unused styles.
2. You cannot apply a style at word level, only at paragraph level. Therefore if a word needs a style, you need to create a paragraph with the single word, apply the style, and copy it back into the paragraph it appears in.
3. Importing a slide from another project bring every style from the entire project across.
4. When deleting a lot of styles (one-by-one) it seems to use a lot of memory, and your project locks up after a few and stops responding. It corrects itself in the end.
5. The link style definitions are not flexible enough. I'd like to be able to develop a link style to use on a dark background and one to use on a light background. I'd like full control over this in the Style definitions.

How does everybody else feel about this? I'd love to see a use count next to styles (as per media/assets).