What helps with inbounds plays is being good around the rim. If you have a big to throw a quick lob to, or an athletic guard/wing good at finishing in traffic, you can get the defense collapsing and it opens everything else up. A guy like Drummond could set a screen and do a quick duck-in and bring two defenders with him, creating space behind him. Or Rip used to get open a lot because he could pop out for a jumper or flash to the basket, so there was a certain unpredictability when he started to make his cuts. And others could play off that (ie Free ducking to the basket while the defenders had one eye on Rip).
We don't have that, so the easiest way for us to get something off an inbounds is to do something unexpected, like have Napier act as a decoy and/or set a screen to free Giffey or Tyler up for a 15-footer. Nobody is going to allow Bazz to get open on a catch and shoot. When we did get DD open in the corner (and he didn't shoot), Napier screened for him and DD acted like he was going to go to the rim for a possible lob and flared to the corner. The down side to that in crunch time is we end up with the ball in the hands of players we might not want making the big plays.
Ollie has been in the NBA a long time where inbounds plays are a huge part of last-minute offense (timeouts allow you to advance the ball 70 feet). He knows plays, I'll guarantee that. What he needs are the pieces to make them work. Or if you want to be more critical of Ollie, he needs to be able to coach the players he has to be good enough to execute a small Percentage of that playbook. There's an element of truth to that. There's a difference between not getting layups and not getting the ball inbounds at all.