Defense is just as important as offense, I wouldnt even blink if I could swap IT for Lowry.
But I hope that smart will someday get close to lowry's offensive power. Defense is already on par I would say.
Lowry needed very long time to get to where he is now and he could be a good comparison for marcus in the long run.
I still think thomas is more or less a stop gap in the longrun. (Atleast as our Starting point guard)