Big Gabi's a great defender. I think he has some ways to go before he understands how to use all the physical tools he has, but at his age there aren't many around i'd be picking over him, especially considering his technical ability. He only looks especially clumsy and heavy footed at the moment because he has Saliba and White on one side and Zinchenko next to him on the other.
It's pretty evident though that he has a mistake in him. Long term i'm not particularly worried about it. Most of his issues seem like ones that he will be able to cut out of his game with experience and i'm struggling to remember him making the same mistake twice.
However, i think it's possible that if they remain a part of his game for much longer that, like Xhaka, people won't be able to overlook them when it comes to rating him fairly and seeing what else he contributes. I think him and Xhaka have very similar profiles actually, both in the way they play and their temperament too.