To be fair to BG, if you go back and read his postgame comments last year he was incredibly high on Lammers.
For example, here's a quote from the ACC teleconference on Feb. 8, 2016:
"I think he's got a bright, bright future. He's not the offensive threat at this point that Nick (Jacobs) or Charles (Mitchell) are, but he's our best post defender. He can guard the low post. He did a good job on two or three post isolations yesterday with (Tonye) Jekiri, and he was the only guy that could keep him off the glass yesterday. Even though there were a couple fouls that were called in the second half, he guarded (Brandon) Ingram for a lot of that game. Other than those fouls, he held him to a very low percentage. I think he was 3-for-14 from the field. He has a great understanding defensively and a high basketball IQ. We just need him to be a little more aggressive offensively. He needs to really develop the kind of ability to decide when to go for a block. He's very good in terms of shot blocking. He's in the upper level of the league without playing a ton of minutes, and the new defensive concept of walling up, leaving your feet, jumping up and not playing for the block and just trying to form a vertical wall in the air, which they allow nowadays. The added strength will help him on that his development has been great. I think he's going to obviously continue to help us this year, but also the next two years. I think he's going to be one of the better post players in our league, because he can shoot the ball, too, and that's one area that we need to maybe utilize a little more is his ability to knock down the 17-18-foot jump shot."
My impression of BG was that he knew basketball. He just wasn't able to get his teams to perform at a high level.