CharlaPatch 13.06: is the Warden worth 2,900?

From Riot's notes for patch 13.06 (22 September): • New rifle, the Warden: 2,900 credits, 18-round magazine, 2x scope. • Performance Score (0–500) replaces Average Combat Score. • Agent Mastery replaces Agent Gear: Act Levels reset each Act, Lifetime Levels stay. • Limited-time mode Gauntlet: Glitched: eight duos, 2v2, with drafted abilities. • You can use the Practice Range while queueing. Would you take the Warden over a Vandal or Phantom at the same price? Does Performance Score read your games better than ACS did?