Passing is not the biggest problem, but it's a narrative that allows the BOS media to point fingers for click-bait. The biggest problems with the Celtics are health and lack of mid-tier, consistent players in the rotation.
TT and Kemba struggled early (both have made progress recently with Kemba doubling his NBA efficiency [the original NBA advanced stat and the basis for Hollinger's PER and Game Score stats] in his last 7 games and TT increasing his by 40% since January.
Tatum alone is a huge problem. Pre-Covid, his NBA efficiency per game was 21.1 in 10 games. Post-COVID it dropped to 17.5 in 18 games , but in the last 8 games, it's 12.8. For the same 3 periods, Tatum's shooting has gone from 47% to 41% to 36% from the field and his 3FG% has gone from 44% to 33% to 27%.
Lastly, Smart has missed as many games as Kemba now. Indeed of our projected 5 starters JB, JT, KW, MS and either TT or DT, we've lost 41 games in a 33 game season.
I'm not going to delve deep into the bench issues, but it's young and inexperienced and it shows. My hope is that Danny splits the TPE in two and gets 2 mid-tier players rather than risk it all on one player he may not be able to find.
The NBA starting the season earlier than expected and its scheduling hasn't helped either with the health and inexperience issues.