Was thinking it would be great to have auto-completing tags for HTML work.

You drop in a "<p>text text text</" and the program realizes you have a tag open and prompts to finish entering it for you.

Also, it would be cool when adding a class or id parameter to a tag to get a list of defined CSS rules, as per the existing code insight.

Cheers

try to enter
<p>text text text
and select Edit->Close Html tag.