I disagree that Sennecke is a raw player. And even if you think Sennecke's a raw player, Slafkovsky was drafted 1st overall and was certainly a "raw talent" rather than an established player with little to improve upon. The NHL draft isn't just about taking the player that's currently best, it's about taking the player that best projects to the NHL level.
I'd also disagree with the idea that Sennecke has a tougher development path. If anything I'd argue that he has an easier development path due to all the areas where he shows promise and projection, vs a player like Helenius who doesn't have as many obvious projectable traits or areas for improvement. It's very possible a player like Helenius stagnates as a prospect and is overmatched at the NHL level due to physical limitations, whereas a player like Sennecke that has more developmental runway excels at the NHL level.
Slafkovsky was a player with much better compete level and he was way smarter in all three zones in different situations. You are talking about Slafkovsky who didn't try to outplay small players by stickhandling on the average speed and puck protection.
Its a very different story. Slafkovsky as an adult, Sennecke didn't. Slafkovsky shined by his own, Sennecke too but on the line with Ritchie. And the most important parts are decision making, compete level and the tools - Slafkovsky was very translatable.
Words about "isn't best now" are sad. Looks like you don't listen.
I understand this concept. The real problem is Sennecke should dramatically develop and change different parts of his game. He will change some part of his game, but it is not so big chance he will develop everything. If you are betting on this, let's draft Eiserman. Imagine if he will develop compete level two steps forward, positional vision, his skating and speed, 200 foot game etc. Its sarcasm.
Sennecke is tall. May be with better shot. But not dramatically.
Helenius is better on the edges. His skating techniques are better.
Helenius is competent to play in all three zones. And processing the game in different situation fast.
Helenius is smarter player.
Helenius is better making faster decisions with the puck as a passer - Sennecke is trying to play with thr puck for too long. It doesn't work well on adult level especially with the skating level of Sennecke.
Yes, Sennecke is looking like a player who should gain muscles and it will help to play physical game much better - he is already protecting the puck well. But Helenius is smart player with good compete level - its the most important tool for developing - and he is already has all tools on the good level - already good skater, good versatile shooter, good creative passer, good 200 foot player. Its easier for him to make one step forward, than Sennecke who is far away from being competent, some of his skills needs work. More steps. And adaptation. He will not stickhandle every opponent on nhl level with his speed.
Fans early like sticihandling. Its a very selling feature. But it has very limited future in nhl if player is not skate like McDavid and Jack Hughes. NHL defensemen do not let this things works. Sometimes they did but its rare. Players can not build the game on stickhandling in nhl. Its just fact. Even Jack Hughes more often is trying to outskate opponents, trying to make decisions, trying to manipulate opponents. Sennecke has nice hands and offensive vision to bring parts of this element in cycling.
Overall Sennecke is doing some things that will not working well in nhl, and is not doing some things that nhl game needs. Two way positional play is a thing that will not develop easily. Playmaking with the puck is a selling feature for Helenius too. So it's easier for him to adapt. Nygard? Much easier with his skating, speed, physicals and as better compete level. Like Steve said, Sennecke is great pick for 15-20 range, ceiling is definitely high - still interesting visible potential/more realistic outcome of big playmaker with offensive vision.
But Nygard has visible potential of two way scorer with great all around game.
Helenius has visible potential of two way center.
Catton has visible potential of leading offensive playmaker.
Iginla has visible potential to be great complimentary offensive forward with acceptable defensive game.
Chernyshov has visible potential of two way versatile power forward.
Its not about floor and ceiling only. There is something in the middle and its more realistic outcome.