Perry was a GREAT HS player even though his dad was the coach. Heck, he's the leading scorer in KHSAA history. Now transitioning that to high D1 basketball is a HUGE step up. And it was apparent from his play last season that he is NOT ready to be a major contributor on this next season's team with all of the talent UK has now.
As far as his feelings about Pope, I just think he and his dad feel like Travis is a much better player than the way the UK coaching staff was using him or their lack of USING him. So they put feelers out and found that there were coaches interested in giving him a LARGER role. So now he's at Ole Miss. Which like I mentioned above is sort of shocking considering that he'll STILL have to compete against the athletes in the SEC.
But like
@bookerfan66 stated above, it is interesting that Travis hasn't made a public statement about leaving UK yet either. So there could be some bad blood there. But I HIGHLY doubt there is any between Travis and Trent.