Just my opinion...but Fleener sucks. He is Heath Miller without the blocking ability. I don't see elite separation or RAC ability.
Miller and Cooley are both pretty productive TE's... Generally, if a player is more or less a lock to produce in the NFL, they are gone in R1 or R2. Thus, the label "bust".
By that standard, Fleener is likely gone in the late first (just like Heath Miller). Fleener has better hands than Miller, and better speed. The only way they are similar is that they both ended their senior seasons with injuries...