There doesn’t seem to be a good way to quickly tweak and preview lighting changes either.
Am I missing something? Armory player appears to have been removed in 0.4, as well as asset streaming. As such, there doesn’t seem to be a particularly reasonable way to go about tweaking lighting without re-building the project every change.
Ideally, Blender would just show the right thing in the first place (or something close enough that it wasn’t a huge deal; right now they’re miles apart). But barring that I’d still take a fast iteration path to preview changes in real-time.