OK, at risk of being blasted again, I will chime in.
In my opinion, based on tape I have seen of Bullock in high school, and some other things I have read - but not based on any knowledge of how he has performed in practices at RU, or any inside information:
1) Even in high school he is basically a Power Forward in skills, housed in a Shooting Guard body. Which would be confirmed by the person in this thread who reported on what he saw from Bullock in practices or workouts: Decent shot out to 15 feet, occasional 3-pointer ... that is basically a power forward; Not that athletic ... so, he cannot make up for his lack of height with exceptional athleticism (like Rashod Kent, for example, as an undersized Center).
2) He is not all that athletic ... he is strong, but not that quick, so in my opinion, cannot even play Wing Forward, let alone Guard ... and if he cannot defend WF or Guards at 6'3", he also cannot defend PF's at only 6'3", becuase he is too small.
3) PURE SPECULATION ON MY PART: He was rumored to be close friends with Naz Reid, and when Pikiell started as RU's head coach, RU was scrambling to fill a roster. I believe Pikiell decided to take a chance on a young man - maybe a very good character young man - who was an All State player by local papers (though lowly ranked by regional and national recruiting sources), who was close friends with a 4 or 5 Star front court prospect. But if I recall, Bullock had almost no other offers. Read between the lines, and you will understand MY opinion, though it might be uninformed by inside information.
I make no judgments on his character, on his effort, etc. It is just my opinion that he was never a P5 prospect - and was not even sure he was anything other than a low Div 1 level prospect.