Hi,
sorry for late reply, today we are too busy
it is possible to make the table headers clickable so you can order by those results
No sorry, this is not possible.
or have a standard 'order by' select box with ASC / DESC
You can create many user lists with different orders, after this you can manage by showing menu items in a module, or if you have some javascript knowledge you can put in a module a select and when user change value it trigger a redirect to correct menu item.
Is this on the roadmap?
For now not, but maybe in future we will add this feature.