It looks like you stopped paying attention to Ehlers after the Penticton tournament. Ehlers scored 8 points in his first NHL 10 games, then got demoted to the third line for 30 games to "learn" the defensive game where he only scored 5 points. Most of those 30 games featured Paul Maurice's consistent but inexplicable use of "Third line Jesus", Chris Thorburn. Many of those third line games also featured the world's most gifted puck handler with near zero offensive IQ Burmistrov. Freed from those two players who are known as the destination where pucks go to die, Ehlers then scored 10 points in the following 10 games when promoted to the 2nd line.
So the first 10 games Ehlers scored at a 65.6 point pace, and the final 32 games at a 64.06 pace. The 30 games spent with at least one, if not two of the world's worst offensive players saw him score at a 14 point pace despite making many spectacular plays.
I think avoiding Thorburn and / or Burmistrov this coming season, Ehlers scores a minimum of 60 points and I would put my money on him finishing at a 75 point pace. He is one of the fasted players in the NHL and he handles the puck and creates plays at top speed.
Back to the OP, this deal is the worst for both Pittsburgh and Winnipeg. I do think the Jets give up the best player. The fact Philadelphia gets 2 draft picks when they are giving up the oldest player with the least upside boggles the mind. BTW, I am a fan of both Maatta and Schenn.