I will be following Sennecke's progress more than any other prospect not on my team. Will be fascinating to see if he develops into a star, which he should be as a 3oa, considering who he was picked over. I anticipate him growing to about 6'4", and packing on another 20 lbs, or so in the next 2-3 years. That's a lot. ANA has to be patient with him. He is a Jan bday, so will have to play CHL for two more years, which is fine. Let him get bigger, stronger, faster, more mature, and have him hit the ground running in 3-4 years when is growing is done and he has had time to figure out his skills in his new body.
Players like Celebrini and Demidov are more or less finished items, physically, and skill wise. Sennecke is a rough diamond who needs a lot of polishing before he shines.