Nobody recruits with a 100% success rate. If 2 guys aren't cutting it, why wouldn't you want them to transfer? We have guys transfer every year.
Name teams other than KU, UK, Duke, UNC, etc. that regularly compete for championships period. Also, name a school that's ever recruited 6 top 150 players other than those schools. Lastly, I'm not expecting to be competing for a championship next year.
Don't get me wrong, I'm not talking about taking just any HS players. I'm talking about high quality players. If the choice is between bringing in somebody like Shepherd or a grad transfer with the 6th spot, then I'm all for the grad transfer. But if it's a guy like Harmon, Hill, or Iwuakor, I say bring them on.
I'm also unsure how much relevance "balancing the classes" truly has. We're not going to have 6 seniors on our roster from this class. The odds of Harmon staying 4 years are slim to none. It's also likely that 2-3 others will transfer (for a number of reasons) or go pro (Europe or NBA).