Lou tends to fall in love with his roster when they show a modicum of success. He is great at installing a winning culture. However, he tends to be too loyal towards players he deems play the game the right way. On one hand, it's good for culture. On the other hand, you fall behind skill teams pretty quickly.
As a whole, the team has been pretty bad 5v5 this season. Most notable is that they do not look good defensively. Offensively, they are better, but it seems to have cost them some defense. However, there have been games (like the Devils game), where they look like a legitimately good team. In most other games, they heavily rely on Sorokin. It's not sustainable.
I've been consistently critical of the team building. However, most posters here tend to point to the two deep playoff runs as evidence that Lou has done a great job. However, it's been clear for several years now, that the Isles just don't have enough firepower to compete with the elite teams in the league. They had a window to improve. Unfortunately, they doubled down on aging middle nine forwards who don't move the needle offensively (Palmieri, Pageau) and a top 6 dman with virtually no offensive skill (Romanov).
It's tough to win in this league when you squander cap space. The last 10-15 games or so, they have been playing better. Hopefully, they continue to build on it and are able to capitalize on something substantial at the deadline without giving up too much. I'm not hopeful as 1st rounders have been moved for the likes of Palmieri, Pageau, and Romanov. The track record is poor.