1. I don't wanna see my Kopete - except the message sessions - in the taskbar anymore...
2. closing message sessions (tabs) pressing ESC
3. the ability to choose between send message by Enter, Double Enter or ALT-S (I prefer ALT-S... it works, but if there is a menu bar, the alt button will activate it...)
4. third party plugins...?
5. your own Kopete subforum...!
I'm a fastidious Miranda user u know... so... i think the miranda concept is quite perfect. It is a very flexible and functional IM because of its 3rd party plugins.. maybe u can adopt some ideas...
btw. ... Kopete seems to me being the best IM on Linux...