You may have a point about lapses (saw some last night on defense) -- but Jordan also didn't play point guard in his youth. Watch the clips of young. His intensity developed as he matured. So, you may be right about the mature Jordan. No one play with more intensity.
What does playing PG have to do with defensive lapses. All positions can make them.
Does rookie Mitchell play with more intensity than rookie Jordan? Maybe. But we only have 30ish games to judge Mitchell by and a whole career to judge Jordan on.