I agree that support has been quite sparse here, if we look at posts from 2014, almost all of them has some great insights by an Epic team member, now we can’t even get info about very generic things that doesn’t need any expertise, like the state of wiki, roadmap, etc.
However, I don’t think Epic lacks the concept you’re looking for, from time to time you can find very insightful technical responses from staff members, so it’s not that these people don’t exist, there are just not enough of them, or there are too many things they should be doing so that they don’t have time for the community (besides asking for patience or promising things, but that has been going on for years now).
Anyways, just to answer your example, in Blueprints you can’t “override” inherited components. In C++, you can do something like this: A new, community-hosted Unreal Engine Wiki - Announcements and Releases - Unreal Engine Forums