Except the Islanders weren't an "80 point team". They were a team that happened to get 80 points in one bad year, after a 3-year period where they averaged almost 100 points a season.
It's actually quite funny, because most of the 1m+ AAV players that Lou targeted and acquired since joining the Islanders have been forwards, and their offense is bad and has been getting worse every year. Their defense has improved, but primarily due to players that Lou had nothing to do with.
Here are the 1m+ UFA skaters that Lou brought in to the team:
-Filppula (2.75m/1 year/NMC) - Played one mediocre season in the bottom-six and then left.
-Brassard (1.2m/1 year) - Played one mediocre season in the bottom-six and then left.
-Kovar (2.0m/1 year) - Contract terminated before playing a game.
-Komarov (3.0m/4 years/M-NTC) - Signed after being a healthy scratch on his previous team. Currently a healthy scratch and cap dump less than halfway through the deal, signed until he's 35.
-Hickey (2.5m/4 years) - Played less than half of a season as a #6/7, and has been a healthy scratch and cap dump ever since.
-Sbisa (1.5m/1 year) - Their #8 defenseman, played a total of 9 games.
And the 1m+ skaters he brought in through trade:
-Martin (2.5m/2 years) - 14th highest forward TOI/GP (41+ GP) on the team during those years. Re-signed for 1.5m/4 years, until he's 35.
-Pageau (Rental) - Cost 1st, 2nd, conditional 3rd to acquire. Re-signed to a 5.0m/6 year contract into his mid-30s before even playing a game.
-Greene (Rental) - Cost 2nd round pick. Their #6 defenseman, re-signed for 2.7m/1 year, at age 38.
The longest term he gave an RFA was Johnston (4 years), and he's largely been a healthy scratch since. He re-signed Lee, Eberle, Nelson, and Pageau to expensive long-term contracts into their mid-30s with NTCs, and as a result, was forced to bridge Barzal, Beauvillier, and Pulock post-ELC, and trade away one of their better defensemen in Toews, even with one of their bigger contracts retiring. Nelson and Pulock were walked straight to UFA in their 3rd contracts.
Pretty much the only positive thing Lou did was bring respectability to the goaltending, and even there, he's made some questionable moves. He got Lehner, who was amazing, only to let him leave and sign a worse, older goalie to the same cap hit it would have cost to keep Lehner. He let Sorokin cancel out his ELC, and then signed him to a 2m/1 year contract before playing a single game in the NHL.
How anybody can think we'd be better off with Lou is beyond me. His team has gotten back to their previous level largely despite him, not because of him, and he's sacrificed the future to boost the present, despite no hope of actually winning a cup. People here would have had a fit if Dubas made any of the moves that Lou has made.