@HighEliteMajor
I think this is also reflective of Coach Self's new recruiting approach that he's been building for the last few seasons.
He knows that in order to compete for a title consistently, you have to have top shelf talent, and the only way to guarantee that you have top shelf talent is to recruit the best high school players.
As @drgnslayr said, it's hard to improve drastically while playing D1 ball. There's just not enough time to practice and work on your weaknesses, spend time in the weight room, film study, with coaches, etc. to make huge leaps either in season or during the off season.
For that reason, you can't expect a guy that comes in ranked low to make "the leap" from his freshman to sophomore year. Perry Ellis has made significant strides this year, but you have to remember that he was a top 40 recruit.
Maybe Frankamp makes a similar move next year, although his situation is different because of his size and position. I think he could be a nice gunner off the bench like Forte at OSU, or like Heslip was at Baylor before this season. I don't know that he will ever be a starter, but he doesn't have to be a starter to be a very productive player. If Greene doesn't develop into a starter level guy, you're completely dependent on Mason and unknown top 25 recruit in the backcourt in 2015-16. I think Self has seen that he needs to surround his incoming freshmen with some experienced contributors.
Next year, those experienced contributors will likely be Selden, Ellis, Tharpe, Traylor and Mason. All five of those guys will have played significant minutes this year. Greene and Frankamp are a year further along at this point. Add in Oubre, Alexander and Lyle, and that's a team that could play deep into March again.
Subtract Selden, Tharpe and Oubre from that mix the following year and add a couple of Top 25 recruits to the Ellis, Mason, Traylor, Lyle, Alexander, Greene, Frankamp group and you can play deep into March again.
And so on. If it lines up right, Self can literally just reload every year with one or two OADs, plus a couple of guys that are 2-3 year players and another 4 year guy (a Frankamp, or Greene, or Tharpe, or Traylor) to compliment the McLemore's, Oubre's, Wiggins' and Embiid's he also lands along the way.