A lot of this stuff is often very core-engineering-related to the engine. If you had an engineer on your team with that kind of knowledge, you wouldn’t have them browsing the forums. Bug reports are indeed the best way to get things on Epics radar, unless like others say, you have UDN access (but that’s more for specific issues, it’s not for making more general feature requests).
TBH, stuff like this usually gets done when Epic need it themselves.