If Larsson wasn't a top ten pick, he would have spent another year in Sweden, then a year or 2 in the AHL and would be a rookie last year or this year. He's still the youngest defenseman on the team other than Severson.
That would be like cutting the cord on Merrill before last season, or on Gelinas in 2012, or Andy Greene while he was still in college.
This 1000 times!
I'll reserve judgment on Larsson's career as a whole until he's 25 or 26.