Dillon Brooks is a decent defender but he is a real long ways from elite
he plays with intensity and sometimes that can look like he's defending great. But the results are not great. Brooks has consistently posted defensive ratings 2-3 points worse than his team. And he has a negative DBPM. An elite defender would not have those results
by contrast, Matisse Thybulle...a truly elite defender (twice named to the all-NBA-Defense 2nd team) has consistently posted defensive ratings 3-4 points better than his team. This season he was 3 points better for Philly, then came to Portland and was 3 points better here. And while Brooks has a career -1.0 DBPM, Thybulle has a career mark of +3.3
which points out that there is no reason, at all, for Portland to consider Brooks when they already own the Bird Rights to Thybulle. And unlike Brooks, Thybulle knows enough to stay in his lane. He's actually a better shooter than Brooks with a TS% of .551 vs Brooks at .512. But Thybulle only sports a career 10.1% usage rate. Brooks is at 23.2%. For chrissakes, Brooks actually has a higher career usage rate than Anfernee Simons
some other factors as well: Brooks is a crappy rebounder for a 6'7 wing. His career rebound rate is 5.9%. 6'2 Damian Lillard who lives on the perimeter has a career rate of 6.2%. And he's a poor passer and facilitator. He has a career assist rate of 11.1%. Trendan Watford has a rate of 15.4%
so let's review Dillon Brooks:
* an inefficient high usage chucker who apparently has no control or shame about his chucking. A career TS% of .512 when the NBA average is .550
* a career PER of 10.9 when the NBA average is 15.0
* a career winshare/48 0f 0.033 when the NBA average is 0.100
* a career BPM of -3.8 when the NBA average is 0.0
* a career ValueOverReplacemt of -4.6 when the NBA replacement level player has a -2.0
* a poor rebounder and a weak passer
* comes with a ton of personal baggage
if Portland re-signs Thybulle, there's no room on the roster, IMO, for two offensive non-factors