I'd like to see improved Ajax support in Click 2.3.0, especially around the area of reusable Ajax controls. It is not currently possible to create such controls.
There are a number of approaches to improve Ajax support, so here is a list of proposals to stimulate further discussion:
With the deprecation of stateful pages we need a way to preserve control state across requests.
See https://issues.apache.org/jira/browse/CLK-532