When adding a bang it'd be nice if the kagi query placeholder was an actual prefilled field so it can be used to build up a kagi query for the bang
A button to url encode the current url template would also be nice so the user doesn't have to do it themselves. When I tried doing https://kagi.com/search?q=%s site:example.org it routed me correctly as the browser cleaned up the url but I'm not sure how reliable that is

Would save a bit of time when creating a plain kagi search bang