To be honest, the dynamics of the league and where players come from has dramatically changed. North American players are coming from wealthier backgrounds and usually more urban environments. We are seeing less farm boys by the year. For example in 2015 all top 5 picks were from major American/Canadian markets (Toronto and Boston), previous year 4 of the first 5 NA players were from major metropolitan areas (Bennett/Dal Colle from Toronto, Reinhart/Virtanen from Vancouver) and while not a major city, Ekblad was from a wealthy Windsor suburb if I remember correctly. This year wasn't as extreme with Dubois raised all around Quebec due to his dad's career, but Matthews, Tkachuk, Keller, Brown, and McLeod all grew up in places much larger than Winnipeg.
Trouba, unlike many top hockey prospects never really had to move too far from home until he was nearly 20. He grew up around Detroit, went to the USNDP just outside of Detroit, then went to University of Michigan. Compare that to the typical player of the 1980's and 90's. They usually left smaller towns or cities, to play in a tiny CHL city, then paved there way to the NHL. I don't think these kids are more entitled, we are just seeing kids from different backgrounds than we commonly saw in the 1980's/90's.