Just a visual thing
I also use DE Reggie as my DT Von Miller as my DE
Once I get Charles Woodson, he will be my FS
OVR means nothing. I run CB's at safety all the time and they play fine. Obviously he needs traits/numbers to match what a safety needs..... I currently run Charles Woodson at FS and was running Night Train Lane at SS for awhile and they both played really well.
I want to run CB fields at FS, because all the fast and tall FS are hella expensive. However, when I sub him in at FS in my lineup screen his Ovr goes down to like an 80 or something. Does this affect how he plays or is it just a visual thing?