Dream has worked with many players over the years, I feel like Sengun has the best foundation to pick up what Dream is laying down as far has post moves. At 19 Dream was all power, quickness and speed. Carol Dawson and Moses Malone are the ones that showed dream how to get a bucket with agility from the post. Sengun already has the agility but the explosiveness can't be taught at the level Dream had. That's ok, Dream was a once in a lifetime player. Segun has a much better shot at 19 than Dream ever had. Don't get me wrong Dream learned to shoot much better over the years and more importantly he learned to focus in the clutch moments and nail the shot for the win. Sengun could really be a great player if he continues to grind it with and without Dream.
I think the biggest immediate takeaway is that Sengun will be taught how to be more mobile and how to use his existing mobility / the mobility that he'll learn, to be a better basketball player. I don't think Sengun should necessarily learn and incorporate the dream shake, specifically. It's as you said - it even took Hakeem, as great as he is, years to learn how to consistently use the dream shake. The goal for now, for Sengun, should be to improve mobility and utilize it in the post to bamboozle defenders, create space, get past defenders, etc. In that tweet video, Olajuwon was showing a one-dribble, spin to the right. Then a one-dribble, spin to the left. Rinse, repeat. I think that's the kind of technique that's way more helpful to Sengun now, than trying to learn the dream shake.
^This... a lot of people get blinded by "learning the Dream Shake" and for good reason, the Dream Shake is poetry in motion on a basketball court. Problem is, the Dream Shake is not a move; it is a sequence of moves and counter moves that becomes the Dream Shake. Right now, Dream is teaching him individual actions that Sengun can use to gain initiative depending on where the defender's weight is. Once that becomes ingrained, then Sengun can figure out what his counter to that will be when if the defender adjusts and stays with him after a quick spin.
He can certainly help improve his mid range game and defense. Excited to see Dream’s continued commitment to the franchise.
Crazy thought, and I can't tell who all benefited from his training, but Hakeem said a few years ago that of all the people he's trained, the one who seemed to embrace, execute, and learn from it the best was .... Spoiler Kobe Bryant
That could be a plus though, as he will often have the lower center of gravity vs bigs. They'll have to give ground or get lower to match his hips and both of those things can be taken advantage of by a smart player.
Forget the dream shake, too hard. Master the baby hook over the middle…Othella was the only one that I’ve seen that ever came close to getting it down after lessons with CD. Face-up and blow by is also a must. Dream would cross you up now.