Each time he's come back from injury he's struggled making easy shots, point blank shots. He's had an eye injury and a broken hand, the effects lingering for months, you don't just go back to the player you were before the injury. It takes time to get used to the speed of the game, get your shot mechanics back down (especially after you haven't used your hand for a month), get your handles, conditioning, etc. everything feels really weird when you come back.
He shouldn't be taking layups so he should stick to jump shots? Leonard needs to regain his rhythm ( from injury), he's not missing layups because a defender is forcing him into missing them, he's missing them because he's missing them, the chances or him making those shots are extremely high. He's made them in years past, still has been making them when he's been healthy this year.
Part of it is lack of chemistry, it's a learning process, much of these drives will fail because of this, that alone will affect his shooting %. Everybody should know by now though, when you see Leonard in the paint or driving, clear out. Still, his teammates continue to make the same mistake of crowding him, drawing their defenders into him, forcing Leonard into low % shots. Those mistakes fall on Leonard's teammates.
They are his teammates fault when they actually run towards Leonard, crowd him. I think his teammates think they're helping, but the reality is they're hurting. Bonner, Duncan, Baynes, etc. sometimes they're nowhere near him in the paint and they'll run towards him, it neutralizes Leonard, happens all the time.
It has gotten better as the year has progressed, as his teammates have simply gotten better.
Injury to both him and his teammates, lack of chemistry from injury, Spurs trying to learn to play around Leonard, all those factor into his low driving %. It's not like he's missing these shots lately though, just jumpers.
I don't understand why Pop doesn't put him in more PandR, he's a very underrated passer. He's had some great passing games this year which weren't flukes. Especially in the beginning of the year, he would've been averaging something like 5 apg if Diaw, Anderson, Daye, Belli, etc. had been knocking down those wide open 3's. From the small sample size I've seen, he's great at it.
Btw I think the pause you're referring to is him creating space through bodily contact, he throws his body into the defender, knocks them off balance neutralizing their shot blocking ability, creates space for an easy layup.