lowry and conley are great guards… but looking at the 2016/17 stats:
Conley: 19 ppg / 5.7 apg / 3.6 rpg / 44 & 53% fg & efg / 2.46 assist-to-TO
Lowry: 20.6 ppg / 7.4 apg / 5 rpg / 44 & 54% fg & efg / 2.47 assist-to-TO
Wall: 24 ppg / 9.7 apg / 4.2 rpg / 46 & 50% fg % efg / 2.20 assist-to-TO
…Wall scores more and as efficiently, and assists more with almost the same assist/TO ratio, on a much worse team. you say “lowry and conley are better in their systems” — what do you think would happen if Wall was in those systems? playing with Gasol or Derozan, with better coaches, teammates and benches? all three are good defender, and yes — both those guys are better leaders than Wall, but he’s a better overall player than either (and 3–5 years younger than either).