We have been discussing the current usability problems in all modules that manages servers taking this dns-server screenshot as starting point. http://paste.opensuse.org/51547407
We mainly have two problems: - Users expect different effects on running/stopped after changing enabled/disabled (and vice versa). - Sometimes is not so clear when settings should be written to configuration files and when that configuration should be applied to a running server (service reload).
I'll try to summarize a possible solution after listening to QA team and SUSE's UX team. For details check 
1) Change the UI for enabling/disabling. We don't need a box with radio buttons. It would it better to have a single checkbox. [X] Start DNS server when booting
2) Remove the "reload" button in its current form
3) Add a button [Apply current settings] which works exactly like "ok" but without quitting. Initially disabled. Enabled once the user has changed something.
4) Use pop-ups to ask the user about their intentions when saving changes or running the server. A subtle but important detail - the goal of the pop-ups is exposing functionality and offering options, not warning about something that some users can perceive as problems (and others don't).
4.a) User changed any configuration and clicked on "Start Server Now".
Show dialog with "changes are pending" message and two options: "Cancel" and "Save Settings and Start Server Now".
4.b) User changed any configuration and clicked "ok" or "apply":
First of all, save settings to configuration files. Next step depends on current situation:
a) Server is not running Ask the user if they would like to start the server now
b) Server is running and “start when booting” is marked Reload the server
c) Server is running and “start when booting” is not marked Ask the user if they would like to stop the server now. If they decide to keep it running, reload the server.
What do you think? I'd say it makes a lot of sense. But I'm not sure how the reloading of setting is currently managed in most cases and if somebody could complain about the settings being "immediately" effective on already running services.