Yes, so that means that he gave up very little pressure at 350 pounds and now he is much more athletic.
I watched tape on several games (Alabama, Georgia, LSU, Miss St). What stood out was how nimble he was for a big guy. There's plenty of examples of him pulling and getting out ahead of a run play. He moves well in space but he doesn't always find a body to block. Defenders get off run blocks too frequently, bouncing off his initial contact. I'd like to see him sustain blocks and move people. He can do it, but doesn't show it consistently.
In pass pro, the combo of his size and his feet made it difficult for anyone to get around him. He's fluid but seems top heavy to me at times. He doesn't always look graceful, but gets the job done. I didn't see speed guys bend around him. He got enough depth to push them past the QB. I didn't see bull rushers power through him. When he got pushed back, he had the balance and bulk to reanchor before he got pushed into the QB's drop.
Overall, I'd say that there's a lot of upside with Borom. If he can put on 10 lbs of muscle and refine his technique, he's got the potential to be a good starter. Probably not until next year but we'll see what he looks like in camp.