I think you both have a fair point as it pertains to guys like Lanier, Milicic, and Dubar. We need to see those guys do it at the highest level before just assuming they are the latest and greatest. Our staff believes they can be, which should give us hope, but they also believed in guys like Tyreke Key, Jordan Gainey, and EJ Anosike. Not all those lightly-recruited, lower-level transfers translate their skill to the SEC level at similar outputs following success at the low-major level.
However, Felix Okpara is entirely outside of that mold and was the specific player mentioned in the post you quoted. Okpara was a consensus top-100 player, a kid Tennessee heavily recruited as a high school player, and has played with success at the highest level. He has similar efficiency number as a sophomore to what Aidoo had as a sophomore. He plays with more edge and aggression. He's a better finisher around the rim. There's a lot to be excited about with him and expectations are more fair because he's competed at this level with some success. An offseason with our staff developing him should present another level of improvement.
Long story short, there is less hope and blind optimism involved with expecting him to help adequately replace the departed than there are with the others.