please no no no - don't accept that deal
unless the league stats count 5x points for rookies, you are losing big time.
Tavares is a potential top 5 scorer for the next several years.
Kuznetzov probably best prospect, but may stay in KHL.
if you are rebuilding, don't trade your one and only superstar.
if you can trade older players like Jagr, for younger players like Reilly thats fine.
lets say somehow that team finishes last (despite having Tavares) or most likely you finish last, and get 1st overall. you'll draft Mackinnon, hoping he turns out like tavares.
i took over a last place team in one league, and i made some deals getting players like Couture, Letang, Lucic trading some older guys like Hartnell, Streit, etc.
p.s. this should be posted in keeper trade thread