Certainly there is an effect whereby reluctant shooters put more of the shot-taking burden on their teammates. If you put enough reluctant shooters out there together, the team suffers. But for Audige and Buie, this may be a positive because they want the ball.On the other end of the spectrum are the guys who would rather not shoot - Greer and Roper.
"Rather not shoot" is exactly right. Part of the reason Buie and Audige have to put up so many shots, sometimes bad ones, is that so many of the other players are just unwilling to take a shot. The two you mention (Greer being the worst offender) plus Simmons, and even Berry for stretches just won't shoot. That leads to Buie or Audige firing shots late in the shot clock or taking the early semi-open shot for fear that there won't be a better shot later after one of the others dribbles away the shot-clock.
Checking the stats, when we have had Audige, Greer and Roper on the court, we have outscored our opponents 18-14 (obviously a small sample). When it has been Buie, Greer and Roper it has been 83-67 in favor of NU over about 41 minutes of action.