John Hollinger in The Athletic assesses all the rookies as we approach the halfway point. He feels this draft class is turning out to be a lot better than expected based on the early returns. He divides the rookies into tiers. Okoro is in Tier 6, titled "Playing a lot doesn't mean playing well."
Isaac Okoro, Cleveland (5th pick) — Okoro will get the benefit of the doubt as a high-wire athlete, particularly since his defense is solid enough to keep him in the lineup while the Cavs wait around on his offense. For instance, how many guys can do this? [Video of a monster dunk off a baseline drive]
That said, the rest of Okoro’s offensive package is … not even really a package. It’s more like a tree sapling that still needs to grow in a forest for 20 years or so, get cut down, dragged down the hill and into town, processed at a mill, converted to cardboard, shipped across the ocean and then shaped into a package. In theory, he can get there, but it all feels a very long way away. Okoro is shooting 25.5 percent from 3 and scoring a meager 11.1 points per 100 possessions; in fairness, he also goes long stretches while hardly touching the ball at all.
More worrying for an alleged athlete, his rebound rate is in LOL territory at a pathetic 4.0 percent — the worst figure of any player 6-5 or taller and the eighth-worst in the league. (But amazingly, only the third-worst in the Cavs starting lineup!) Usually, players with elite athleticism make their first impact in the rebounds/blocks/steals line and then pile skill on top, but Okoro is invisible here. He’s still figuring out how to make his gifts impact the basic stuff.
There it is - no offense other than an occasional spectacular dunk when the seas part and no rebounding. Invisible in terms of scoring, rebounds, blocks, and steals. A lot of guys drafted lower than him doing much better, including Immanuel Quickly, who was drafted 25th by the Nets and is in the first tier along with Ball and Halliburton.
Among other players reputed to be considered by the Cavs at #5, Devin Vassel (11th pick) is in the second tier. Obi Toppin and Deni Avdija, drafted 8th and 9th, are in the fifth tier ("Starting Slowly"). Killian Hayes, the 7th pick, is in Hollinger's 7th tier ("We might have a problem here") while Onyeka Okongwu (6th pick) is in the 8th and lowest tier ("Witness Protection").
So the players drafted 6-9 are either doing worse than Okoro or only slightly better (5th tier).