Like Matt said, Acuna would have to go cold not to win at this point. Fangraphs WAR uses OOA + UZR Arm instead of fielding run values from statcast, so his lead in WAR is probably understated since UZR isn’t as sophisticated at measuring how many advances RAJ prevents.
I believe Acuna would be up to ~6.5 WAR if they used Statcast's arm values. Unless Freeman goes on a tear to where he is a good 10 points above Acuna in WRC+ and over 1 WAR higher I think the award is Acuna's.