Tatum is better than ever.
Last year he was slightly more efficient overall on higher volume BUT that was largely a factor of him excelling off ball and in team created opportunities. Valuable no doubt but we all know that there's gonna be plenty of times where Tatum just has to take the ball and make stuff happen.
The good news is; he's reaching new heights as an on ball creator in virtually every aspect.
Top isolation creators on at least 4 possessions a game including passes

Top PnR Creators including passes on at least 500 total pick and rolls

Top post up creators including passes on at least 100 Post ups

All these stats are from Synergy and include passes, making them much more informative than the ones we get from NBA.com.
As you can see Tatum top 13 in Iso possessions, pnr ballhandler possessions and Post ups. This is an incredibly varied and rare skillset to excel in all 3 of those. Something only replicated by Lebron, Harden and Luka as far as I know. Now of course, these are not full season stats so he might regress in some areas or the volume might not prove sufficient BUT these are all sizable increases over previous years and solidify in my mind that he has a special playoffs ahead of him. He's finally graduating to apex on ball killer and its going to be glorious.