He seems easy as hell to evaluate.
Good sized, and can definitely play NHL C. Mature both physically, emotionally, and mentally. A Leader/captain material. Average skater who makes up for it with efficient and intelligent positioning. Excellent defensively, yet still is able to contribute offensively. NHL calibre shot and release. Good vision and passing ability. Above average in board and net front battles.
I could go on. He blew away the performances of players who were picked before him like Perfetti, Holtz, and Quinn at the WJC, and has a track record of consistent play both internationally and playing against men in Finland.
Of all the players picked in the top 12, he is one of easiest to assess, IMO, together with Laffy, Stuetzle- maybeDrysdale? I like Byfield a lot, but who knows what he is going to be? Same with Perfetti, Quinn, Rossi, Askarov, maybe even Raymond and Holtz. I'm sure that at least a couple of those players are going to be better than Lundell, but I have no idea who, because they have been inconsistent when asked to play at a higher level than junior, excepting Askarov, and even he has looked worryingly unstable.
Lundell was a rock in the WJC, where he captained his team to overachieve, and is also a leader playing a very good men's league, whereas most of the other players were dominating against teens previously, and do not play NHL level defense.