I don't see that.
1.We've only had one of those in our history, and he's a 6'11 athletic freak of nature.
2. More importantly, Purvis is missing about 4-5months this offseason due to surgery. Young guys developing their game need that offseason to learn/prepare. Look at what happened to Omar with no offseason; I think it'll take Purvis a little while to get back up to speed. Note, I don't expect remotely close to an Omar type season for Purvis.
3. He wants to learn the point guard position, one of the reasons he came. That takes time, as he's a natural two. No better place to learn than under Ollie. He won't truly get the feel for the point until Boat leaves. Boat is (hopefully) going to be our Shabazz--the man--next year.
I'd argue that it is easier to pick up the PG spot in college than in the pros. Nobody in the pros wants to turn over the key to the team to a guy who isn't top notch. Everybodies' fighting to put food on the table, and they need the ball in the right spots.
jmo though. He could turn out to be the best in the country. Which would be nice.