I just read Dom's comments on him in the PRO thread, seems like a great kid. From a production standpoint, the guy that immediately came to mind was Mike Amadio (LA 3rd round pick 2014) who played for the Battalion a few years ago (he was on my radar because I drafted him in our SIM league).
In 2015-16, Amadio put up numbers (50g/48a in 68 games) that are similar to what Brazeau did this year (61g/52a in 68 games). Now, I have no idea stylistically how these two differ, but going strictly from an age comparison, Amadio was able to put those numbers up as a 19 year old. he turned 20 that May and signed with LA. Brazeau put up his numbers this year as a 20 year old, and last year (at 19) he had 39g/36a in 68 games.
Obviously, the teams that Amadio and Brazeau played for were different, and players develop at different rates, but I would not get SUPER excited about Brazeau until you see how his game translates to the pros. Amadio has been an AHL/NHL tweener for the Kings, and so far he has not shown the scoring prowess in the NHL that he exhibited in the OHL. He's only 22, so he's not a finished product yet.