Agreed. Less dusting for the win.

I think it's already insulated well enough and extra insulation isn't needed. How cold is it right now in the basement?

I've never considered how walk-out basements require this secondary interior framing inside the foundation walls. You're already done framing, but you might have considered only framing a pony wall in front of the foundation and having a step back to the exterior framing. You regain 4" room depth above the foundation walls and avoid reframing around all the windows etc. The shelf it creates in the wall may be a plus or minus depending on your aesthetic.