Do you want him to come out and say he would like to be in an environment where he has a better supporting cast?
I'm sure that he would love to play with his brothers. It's a storybook situation. But the fact of the matter is, if a Vegas, Dallas, someone else ponied up the assets and was in a similar situation to win, 3-4m a year over an 8 year contract is alot of money to leave on the table to play with your brothers. Heck 16m over 8 years which is the difference between 13m and 15m AAV is alot to leave on the table to play with your brothers.
New Jersey may be best situated to pull of a deal in the short term due to the stacking of assets they've done as of late. But I wouldn't say by any means Vancouver has no leverage so they should take this deal and he's definitely going to sign with New Jersey if they don't want to pony up assets so nobody else will go after him. Every team in the league would be willing to pony up a king's ransom to bring in Quinn Hughes from Chicago/San Jose to Vegas/Florida. He's a game breaker teams will tear apart part of their core to get him and be prepared to offer him alot of money in the process afterwards, similar to the Matthew Tkachuk situation in order to win and they're not necessarily wrong for doing so.