This probably won't help you much, but it is expected, to take a huge step forward within his team in the DEL. He's supposed to see more ice time and everybody seems very pleased with his development over the last season. And he is with the best team in Germany when it comes to talent development.
So far I haven't seen him play much, so can't tell you anything about his style of play, but that should change this upcoming season.
I hope somebody can give you more detailed information soon.
I just came across a statement on Braun from Jim Setters the coach of the German under 18-national team:
Jim Setters on Constantin Braun and his chances to make it to the NHL:
"Constantin is a very dynamic player and a good goal scorer. He plays at a high speed and is a very tough player. Among the under 18-national team he is one of the team leaders. And though he does have a long way and a lot of work ahead of him, he does not shy away from that work. He is a hard worker, and that could help him along the way."