How is his production crap?
18 year old season: 2nd highest PPG ever for defensemen in the AHL to play a full season
19 year old season: 16th highest PPG ever for a 19 year old in the AHL to play a full season
Anyone can make this kind of claim when they restrict their pool to the point where someone is say 16th, out of 20th.
You can make this pretty simple - there are 8 D from Liljegren's draft class who played 20 or more games in the AHL this year. Liljegren is last in PPG among them, despite the lies that other posters want to tell. There are 3 other recent high end draft D for the Leafs that they had play on the Marlies on their D+1 or D+2 (Dermott and Nielsen in their D+2 and Sandin in his D+1). Liljegren is behind all 3 in PPG. Kylington was often used as a comparable for Liljegren by his biggest detractors and supporters - including myself - howled in outrage at the insult. Kylington had a higher PPG in his D+2 (and had already played in the NHL).
So PPG for D+2 (plus Sandin in his D+1) among 12 players who should be comparables with Liljegren. If you asked most people before the season where Liljegren would rank among those 12 in PPG this year, most would have said first or second (behind Brannstrom).
The reality for D+2 in the AHL:
Valimaki (16OA 2017) 0.700 PPG (also played NHL games)
Brannstrom (15 OA 2017) 0.640 PPG (also played NHL games)
Sandin (29OA 2018 D+1) 0.636 PPG
Jokijarju (29OA 2017) 0.567 PPG (also played NHL games)
Nielsen (65OA 2015) 0.527 PPG
Vaakanainen (18OA 2017) 0.467 PPG (also played NHL games)
Kylington (60OA 2015) 0.450 PPG (also played NHL games)
Hague (34OA 2017) 0.427 PPG
Foote (14OA 2017) 0.408 PPG
Dermott (34OA 2015) 0.407 PPG
Fleury (87OA 2017) 0.383 PPG
Liljegren (17OA 2017) 0.349 PPG (at the time he was injured he was at 0.421 PPG).
Liljegren was the only one of those players with a year of AHL experience. Unlike several of those players (such as Dermott who got essentially no PP time during his D+2 on the Marlies) Liljegren got a lot of PP time during his D+1 (over players like Rosen) and started out his D+2 getting a decent amount but that PP time shifted to Subban and Sandin because they were far more productive on the PP (Rosen was the #1 PP this year and he made the best of it).
I know it might not look like it because Sandin is blowing everybody in history out of the water right now, but basically everybody ahead of Liljegren at age 19 is a top pair guy in the NHL, at the very least a solid top 4.
Again this is not true. All 7 other D from his draft class playing 20 or more games in the AHL this year were ahead of him in PPG, and at least some of them will not end up top 4, just as Nielsen will probably never play a game and Kylington will be a third pairing at best.