The kid is tiny, let's not kid ourselves. IF he grows, he'll likely max out at 5-9 tops.
That said, his instincts, skills, and swagger are top-notch. And, for anyone paying attention, the NHL is no longer a "big man's game." If the kid can perfect his gap control and add enough strength to compete against men, he'll bottom out as a Shayne Gostisbehere type... but only if given the chance to learn on the job and make mistakes. The example I'll use is Erik Karlsson...
When Karlsson broke into the NHL, he was a riverboat gambler who would take tons of chances and get burnt on occasion. He also lost some physical battles (but the NHL was a bit bigger and stronger then). The Sens gave him tons of leash to create and he ended up one of the best offensive defensemen of his generation. If he was drafted by a team who hampered him and didn't let him take chances and make mistakes, his career could have gone the way of David Rundblad of sorts.
Realistic case for Hutson -- 2nd or 3rd pair D with PP1 duty and 55+ point upside (Gostisbehere). Best case for Huston -- Quinn Hughes like.
This time next year, he'll be one of the most hyped D prospects on the planet, the way Olen Zellweger was this summer.