I know that EasyApache4 is wicked simple and makes server management easy but something that is just slider based enable / disable for the webserver configuration would be wonderful. It also has over a decade of development built into it.
I see the start of something like this available in the per-site developer tools but nothing at the server level or default configuration level. This makes quick changes to webserver configs and cluster configs easier since one server in the group can be the test or dev and then the CP can apply it to all (in theory).