Hunter is an excellent man defender. Who takes on all of our toughest assignments at the 1/2/3 positions. He's more like a Dillon Brooks where his metrics don't speak highly but his tape does and he defends the best matchups for us. So he's very valuable for us. He's not much of a team defender nor help-side defender and his rebounding rate is very low.
Capela is baby Gobert. He's an elite rim and paint protector but he's not the shot blocker Rudy is, he doesn't have the instincts Rudy has, and he's just not as good as Rudy defensively but he's an excellent defender. Rudy is AN ELITE defender. Offensively, similar but not as good. Elite at screens and the PnR but doesn't finish as well in traffic. Doesn't have a good touch. He doesn't ask or require touches. If he scores 5 points, he's fairly happy as he is if he scores 25 points.
No way you can lose Gobert and be better on defense. Not possible. He's just too significant in my opinion on that end.
I wouldn't say you take a step back, I mean, you are probably in the same position overall as you now but if you are trading Conley too, I don't know what to expect.