Wow, those are some high hopes.
A Norris or two, and better than Erik Karlsson. Unreal.
Prime Erik Karlsson had a higher impact on a game than any modern defenceman, including Hedman and Makar. I've seen nothing to think that Sanderson will be rubbing elbows with Makar, McAvoy and Fox.
I watched probably every game Erik Karlsson played for the Senators and was a huge fan. His peak was very short because of injury. Had it been longer he would be likely in the Bourque/Lidstrom tier, but that didn't happen.
I think Sanderson is as good a skater at the same age and is a late bloomer offensively. Will he ever be peak Karlsson offensively, very unlikely. However, he will likely be far better than Karlsson defensively and have a more balanced career.
If you don't see any parallels with Fox and Makar then you didn't watch him this season. Had he not gotten unlucky with some injuries he would have won the Hobey Baker on a pretty mediocre team. He is insanely dynamic and just getting better.
Will he reach that potential? I think so but it could go either way. However, you do not trade a potentially "special" Defencemen for a "pretty good" Winger like Debrincat. Especially when you are in the part of a rebuild that Ottawa is in. Sanderson is exactly what Ottawa needs, even if he only hits his floor, which I see as pretty high (great skating, 30-40point, 22-25 minute , shutdown defenceman).
Sure you may get Ekblad Jones Makar or Nurse but you may also get Gudbranson Larsson Reinhart Juolevi. May very well be worth the risk but dont count him as a norris guy already.
Gudbranson, Larsson, Reinhart and Juolevi.
Who are four guys who can't skate anywhere near as well as Jake Sanderson?
He doesn't have that floor without serious injury.