In 6 months he's a new guy?
Here are his stats for the Austin Spurs vs UConn senior year:
Points/Game: 6.0 vs 7.6
PF/Game: 3.0 vs 3.2
TOs/Game: 1.4 vs 1.5
Assists/Game: 0.8 vs 0.2
Rebounds/Game: 6.7 vs 6.1
FT%: 61.0% vs 62.3%
FG%: 54.3% vs 57.3%
Blocks/Game: 2.6 vs 2.6
His stats in the G-League and at UConn are almost identical. Plus, he has the lowest +/- on the team.
As for size, he is listed at 6'10", 230 lbs. now. As a recruit, he was listed at 6'10", 220 lbs. As a freshman, he was listed at 7'0", 217lbs and as a senior he was listed at 7'0", 230 lbs. Does he have more muscle? Probably, but he has not made over his body.
The pros and cons of Brimah have been debated extensively on The Boneyard, but he is not a new and improved Brimah at this point.