Interestingly, I'm much higher on McCain than consensus as well. The only question is whether / how much of his playmaking was masked playing next to Proctor and Roach since he was the only off-ball player that Duke had. Very similar numbers to CJ McCollum as a playmaker at the same age and for me that's his 70th percentile comp. He's checks quite a few boxes:
1. Jumper that's just as good as Sheppard - McCain took more difficult shots at a higher volume, shoots close to 90% from the FT, and his 3PT% was still well above 40
2. Stronger than most guards - his half court rim percentages were excellent among guard prospects - better than Sheppard, Dillingham, and Castle. Also he's built like a brick wall, that strength should hold up in the playoffs where he's getting bumped off his spots more and calls come less frequently
3. Above average guard rebounder - OREB% was actually very similar to Devin Carter; total rebounds/100 eclipse Sheppard, Dillingham, Collier, Cody Williams (lol)
4. Compe ive as and raises his performance for big games - the only guard prospect that noticeably improved against top 50 and top 100 compe ion - FTR went up, EFG% went up, AST% went up, rim finishing went up, BPM went way up. Went out with a bang in the final 4 with 32/6 against NC State. Contrast that with Castle whose offensive numbers completely crater against top 100 and top 50 compe ion
I have him around 6 on my big board, very close to Devin Carter. I'm basically very low on all the wings this year and high on the combo guards - 3/4 of whom (Castle, Sheppard, McCain) have their playmaking masked playing behind or with at least one other lead guard. I'd have absolutely no problem taking McCain at 8 if the Spurs ended up missing out on Sheppard and instead took Castle at 4.