Just posted an interview with him in the prospect thread.
Anyway. He's playing with 4 other D's that has plenty of AHL and some NHL experience right now, so I guess they've given him some advice on the way.
As far as his development goes, he's doing fine so far. Plays on the 3rd pairing but that's on a team with a really deep D squad. Tied for 2nd in scoring among the D's, and more important, he's number 1 in +/-. Gets decent amount of time both on PP and BP. He's fearless, with great timing in his hits. Has developed his skating tremendously over the last year and is now really mobile for his size. Able to take the puck coast to coast by himself if needed, and has a decent shot.
What I like the most about him is his mindset: He focused, knows what he needs to improve on and does exactly that, and he's also really down to earth off the ice. A great guy, no wonder the fans loves him.
Still needs to develop to become a 1-2D in SHL or make it to the NHL team but he should get there sooner or later, might even be already next season, depending on the competition. In the end he should become a very useful player, probably leaning more towards defense than offense but could do both if needed.
P.S: He reminds me a lot about Mattias Ohlund, who also played for the same team here ~20 years ago (so I saw him a lot when he was the same age). Jaros doesn't exactly possess Ohlund's skill level so don't expect him to become an All Star player, but they play roughly the same type of game.