Dylan knows how to play defense and appears to be a willing defender. Ace is still a work in progress. Ace was late a few times getting out on shooters. That can't happen. Both were no shows on the defensive glass and snaring loose balls.
So ... in another thread I started on charting every RU defensive set vs St. Johns. I did not post the list of each possession, but I had opinions on what I saw. Based on that close examination:
On Bailey's defense:
Yes, he was slow to get out to the 3-point line a few times - but I think that was as much positioning, which he is still learning. Bailey also drifted some on help defense - that hurt at times ... but he also made several terrific recoveries on help, using his unbelievable quickness and athleticism to be productive in help defense (Pikiell was not kidding when he said Bailey is a great "emergency" help defender) - when he learns Pikiell's proper help defense he will be the best help defender RU has every had (or if he does).
On Harper's defense:
1)
His on-ball defense was very solid - a couple of cheap fouls, but generally very solid. He really used his size and arm length to generally good effect. Before switches, Harper generally was assigned the St. John's WF - not Richmond or Wilcher, or Smith (the back-up PG). And he did fine, more often than not. He occasionally had issues with Luis (who came off the bench) when he was matched up against him - or on switches ... but Luis played really well.
2)
His off-ball defense, however, needs a LOT of work, frankly. And I am not talking about after he picked up his 4th foul (where his defense was not as bad as I thought upon rewatching, except for 1, or maybe 2 plays). I AM talking about his general off-ball defense (separate from help defense). In re his off-ball defense, Harper way too often watched his teammates with the ball, losing track of the player he was supposed to be defending. That led to several back-cuts and several failed box-outs - which led to baskets and/or St. John's offensive rebounds.
3)
His help defense also needs a lot of work. This is separate from the above comments on his off-ball defense, though obviously related. Harper clearly, on a number of plays, did not know where he was supposed to be, where to rotate to in order to help the team defense. He was not alone in this, but in rewatching and charting the defensive side of the game Harper stood out in this regard. FYI, this is an area in which Pikiell and his staff truly excel in teaching - and has 3 weeks of practice before the 1st real game, and then 3 weeks of playing 5 games before Vegas, and then into December and early January before the heart of the Big Ten schedule, to do so.
Will Pikiell completely fix these issues? We do not know - but for sure it will be improved. Harper is such a smart player, generally, I cannot believe he cannot and will not improve his game in every area coaching is offered. Harper IS a willing defender, it is obvious, fyi.