He's looking ok, I wouldn't say solid. Has a ways to go yet.
Our defense have improved by leaps and bounds, but we still allow some absolutely silly chances. We've cut out a little bit of the softness in conceding chances, but the true mark of a good defense is in not allowing chances, not making last ditch saves reliant upon luck as we still do with regularity, and we're still heavily reliant on Lloris.
If you took away Lloris then we'd be in trouble again. Vertonghen and Fazio still have some growing to do together.