Hello

I've been using K2 for a while and think it's a great tool.

One major flaw for me is the edit page especially front end. It seems to very rarely work correctly (even on this website), looks horrible, very unintuitive layout with tabs, pointless lightbox, etc

Does anyone else think this too?

Really not great if I'm building a website for a client who wants to do frontend editing themselves. Or worse a community submission site - always some bugs to fix and people don't 'get' it!

Hello Nathan,

You can override the itemform.php to your meet your client's needs. More information on overriding can be found here.
getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates