Offseason gains/losses are very random. The higher the WE, the better chance of gains, and the lower, the better chance of losses, but it's really random.
Generally speaking, most of my guys gain in some areas and lose in others regardless of WE.
Personally, I have no problem recruiting guys with WE in the 20s. Even if they lose some in the offseason, most of them will max out their potential by senior year.