Overall, Grant Williams started hot but then tailed off. I was curious to see if there was a particular point in time that things changed so I sorted his general stats by month:
Nov 38.7% 3pt / 8.5 pts / 29.4 min
Dec 44.4% 3pt / 9.4 pts / 27.0 min
Jan 36.5% 3pt / 8.8 pts / 27.9 min
Feb 32.5% 3pt / 6.1 pts / 25.2 min
Mar 39.7% 3pt / 7.8 pts / 21.9 min
I know this snapshot of stats does not totally represent his play but these do seem to correlate pretty well with the trend. After a hot start, he started to tail off in Jan and then really dropped in Feb.
One thing that was going on was his extension negotiations. It is possible that once those stopped, that he put more pressure on himself or something. I also think that he was nursing some injury. There was talk of him having something wrong with his elbow.
More importantly, he seems to have ticked back up in March, albeit with less playing time. When he was playing well in Nov, Dec, and early Jan, he was an important weapon. Even if he is not hitting 3s (which seems to his principle offense), he still defends well and all the other little things. But if he is really going to be a factor in the playoffs, I think he will need his 3pt shot or some other offense. I will take 20 min off the bench with close to 40% shooting from 3.