I have the feeling that Miro won't have problems with NA smaller rink with his IQ and positioning.
He has been playing his whole junior career amongst older competition which has probably crafted him into more defensive player that he has potential. I think best thing for him is to stay one year in Finland. Play against men, start to dominate and learn to contribute better offensively. After that AHL/NHL.
I'm not expert but I have a feeling that he could be NHL ready pretty soon. Especially with his complete defensive play.
As a HIFK fan i can tell that HIFK has facing a lot changes this upcoming season ( 2017-2018).
Antti Tormanen who coached Miro this past season isn't HIFK's head coach anymore Tormanen got fired in April when HIFK lost liiga's bronze medal game to JYP.
Ari Pekka Selin is new HIFK head coach and he's a coach who requires his players giving 120 percent in every game.
HIFK has hired conditional coach ( Harri Yrttiaho) and Miro will work with him throughout the whole summer.
So he has very good chances to get more muscle in HIFK.
No-one not know yet what-kind hockey HIFK plays next season and how that develops Miro as a player.
Miro needs to improve his offence ( scoring points and improving his shot) and that's not easy in SM liiga because liiga is highly defensive oriented men's league.
So lets see what Dallas decides before NHL regular season starts.
If / when one season in HIFK is best to Miro then OK let him stay in Finland.