Maybe they need to get used to the muscle gained in off-season?

Cam, one of our best 3-point shooters last season, has missed all twelve attempts this season.
Amen, very efficient near the rim last season, only recorded less than 40 FG% this season.
Sengun, our best player last season, seems to have lost his touches and moves in the paint.

Although the sample size is still small, I am wondering whether the off-season focus on strength training could lead to the uncomfortable start of this season for some players? I am not saying strength training is not good, just saying it may take a bit more time for them to adapt to the new muscle memory.

Several players develpment coaches were sent to Turkey to train with Sengun this summer, but so far, I haven't seen any improvements (except 3P%).

The bright side is that JG4 finally shows solid improvements in his 4th year, hoping he could maintain the good consistency.