Thanks for your suggestions! We're always interested in making our products (and their plugins) better.
To answer/address your questions/points:
No, not currently. What styles would you be interested in changing? The CSS used for code snippets could potentially be overwritten using your wiki template's CSS. Similarly, you can't currently modify the CSS used for code snippets in case view either, but you could potentially change this using BugMonkey.
This is done with CSS, so it would fall under your first point/question.
Great point. I've been playing with various ways of improving this, but I haven't settled on one just yet.
For code snippets in case events, you should be able to search for them just fine. For code snippets in wiki articles, you're correct--they're not currently searchable. I'll look into finding a way of exposing them.
I'll be sure to update this question if/when we release a new version of the plugin.