I don't think so. 30th percentile sprint speed so he likely is a below average runner and defender at this point in his career. Even if the BsR has positive regression it's probably still negative ROS, and the defense might regress in the other direction (his UZR is +4/150games right now but his career is -3/150games). I'm thinking 5.5 to 6 WAR would be his range of outcomes if he continues to play like this.
Acuna might end up with some insane counting stats himself. He is on pace for:
31 HR, 74 SB, .331 AVG, .404 OBP, 128 runs, 87 RBI, 7.7 WAR
AND his "projected" pace (add ROS projections to current stats) is basically the same, just reduce the AVG and OBP a bit.
What if it's Acuna with .320/.410 30 HR 65 SB 130 Runs 100 RBI 7.7 WAR
vs
Arraez with .401/.450 with 3 HR, 2 SB, 65 runs, 80 RBI 5.8 WAR