I don't understand how Eloy is ranked higher than Acuna. Acuna has better stats at a higher level at a younger age.
He was one rung ahead of him to start the season and I don't think 3 months is enough to justify anything different. Eloy has likely gone from a 60 FV player to a 65 FV player and Acuna has gone from a 55 FV player to 60 FV player. If Acuna continues to hit well at AAA the remainder of the year you may see Acuna catch Eloy as a 65 FV player in the offseason. I wouldn't be shocked by that at all.