It’d be hard to not look good in that setting, those kids were making him look like Dwight Howard in his prime.
Yeah those were clearly practice exercises. There wasn't the kind of resistance you see in games, and I personally, don't feel like I learned much from watching it. That said, I was still excited to see it because Edward's offseason development will be, in my opinion, the single most important factor in the teams success next year.
We need him to protect the rim (which I'm confident he can do). We need him to rebound (which he doesn't seem naturally skilled at, and the hardest thing for a center to do in the zone is be both a rebounder and a rim protector, because it involves difficult split second decisions on where to position yourself). On offense we don't need him to be anything more than a 5th option, but we need him to be good enough so teams can't double off him without being punished for it.
Frankly, its asking a lot of someone who is still in the early stages of his developmental arc. But then again Jesse has some uncommon attributes that will make things easier on him, like his 7'5 wingspan, and being uncommonly coordinated for someone who is that tall with arms that long.
Even if Sidibe is healthy and playing the best he ever has, Edwards will still be our main rim protector, and that is a hell of an important job. A guy who can make it hard to score in the paint makes every defensive player on your team better, and every offensive player on the other team worse.