Just to quickly comment on the Hayton at 5th overall expectations:
Here is a list of players selected at 5th overall and what year they had a decent year or breakout year after that. OF course, decent is subjective but I tried to make it fair.
Blake Wheeler: Drafted 04, First decent year 08-09, True breakout year 11-12
Brayden Schenn: Drafted 09, First decent year 2012-13
Kessel: Drafted 06, First good year 07-08, Broke out the year after (He was quicker to breakout obviously)
Niederreiter: Drafted 2010, First decent year 2013-14.
Elias Lindholm: Drafted 2013, First decent year 2014-15, Steady increase after that.
Petterson: Drafted 2017... success right off the bat.