Leppanen, top scorer in the Finnish league last season, led the Oilers in ice-time at 23:42 and I strongly suspect he also led the team in completed passes. He came out strong, coolly passing the puck out of his own zone on repeated plays.
The young man can make a pass, something the Oilers prioritize in d-men. If you're looking for a stylistic comp, Leppanen plays a heads up passing game in the style of John Klingberg.