What this team needs to do is get out of the shooting slump they are in. They generate more open looks in the league than anyone but are hitting those open looks at a terrible %.
What I want to know about this "open looks" stat is -- who is getting those shots?
Subjectively, I feel like a lot of those open looks are for guys who the other team is happy to let shoot, i.e. Aron Baynes, Marcus Smart, Gordon Hayward (for now), Semi Ojeleye, etc.
Most players, even poor shooters, do well with open looks, but I do think it's worth figuring out just how good all these open looks are. Because if the open looks are by and large for guys who are historically poor shooters, it may not be so easy to simply "shoot better."
Taking a look at the Celtics' shooting percentages ...
Kyrie is shooting 40.5% on threes, which is about as good as you could hope.
Morris is shooting a super unsustainable 48.4%.
Horford is wallowing at 27.6%. We should expect that to improve for sure. He accounts for 4.4 attempts per game.
Tatum is hitting 38.6% of his 4.4 attempts; that may go up, but it's probably around what we should expect.
Brown is hitting only 27.5%, similar to Horford. I would expect him to end up closer to 36%.
Gordon is at 31.9% but it may not be reasonable to expect a ton of improvement there, at least for the near term.
Smart, Baynes, Semi, Theis ... these guys are hitting around 30-33%, which is what I would expect for them anyway.
So yeah ... Horford and Brown should get better. Although I think it's important to note that if the both of them were shooting a combined 40% on their ~9 attempts per game, that would only net the Celts an additional 1.2 made threes per game, or about 3.6 points per game. That said, better shooting from those two would make the starting lineup a lot more potent and may open up scoring opportunities in other areas.