Ah I see now,
“ctrl and/or shift (depends per build and engine generation, forgot what UE4 is at now) + left click and drag anywhere = move/rotate/scale X ctrl and/or shift + right click and drag anywhere = move/rotate/scale Y ctrl and/or shift + both mouse buttons and drag anywhere = move z”
Yes, right now, that is the planned setup for the next build. I agree completely and am excited to see this come out!
-Alexander