I think it's bad, but has the gears to kick up, especially when Fox/Davion get moving on the perimeter. It's absolutely a "make-due and beat people with elite offense" squad, kind of as expected. Sabonis has actually done better with rim protection lately, but you're basically praying he's average. Barnes lateral speed is cooked on D and Keegan is a rookie who has his up and downs on defense like every other rookie in NBA history. I do think Monk has been a pleasant surprise on D, but still. You're hoping he and Huerter are around average. You can't look for them to be stopper in any capacity.
Hopefully the draft nerds on the forum come up with some defensive wing stopper types for us to look at this year. That and a rim protector are really the only glaring holes on this roster.