Players determine their fate, Listi has played in four levels in two years, 53 games his college year, 102 games this year, so where do you get they would have played him more? More than what? If they didn't see him as a prospect, they wouldn't have promoted him so fast, they would have given him the Tomscha treatment - drafted in 2014, didn't get to Reading until 2017..
Bossart wasn't expected to be more than another Logan Moore type, mediocre hit tool, good shepherd of young pitchers, then he hit this year at Reading. Given that Grullon has emerged at 22 (he'll be in their top 20 in the winter rankings), Bossart won't get to start unless he stays at Reading next year, but with the young catchers coming up they won't want him blocking them - but they'll find ways to get him PA so they can judge whether he is a potential ML backup catcher down the road.
With every prospect, things are fluid, a pitcher add 3 MPH or a secondary pitch, a hitter gets stronger and learns how to generate power or improve his plate discipline. All a high pick/big bonus does is maybe buy an extra year before he's ejected, but once you've been in the minors 3-4 years, no one cares where you were drafted or how much you cost to sign.