It's pretty darn clear what he wants. The problem is that he's not very good at it:
Nine percent of Collins' field goal attempts this season have been pull-ups, according to NBA Stats. That's also a career-high, and it's historically a shot he's not comfortable with (39.5 FG% this season). And nearly all of those pull-ups are twos, not threes.
His playtype data looks suspect as well. Collins is posting up over twice as often (17.8% of his plays) as he did two years ago (8.1%), per NBA Stats/Synergy. He's not a good post-up shooter, as evidenced by the 39.4% clip and 14.0% turnover rate.
https://www.basketballnews.com/stories/stats-notebook-has-john-collins-role-with-the-hawks-really-changed