The mechanic referenced in the DevBlog isn't one of multiplication. It increases the chance that "latched enemy planes" will have planes in the attack flight targeted first by AA. This could help reduce incoming damage on a strike if those planes have tripped a placed Fighter.
After the first few minutes of a match, there is a significant amount of surface spotting that happens. If the CV is attacking a target which is already surface-spotted, like a Battleship or Cruiser that is actively firing, loss of the "plane-spotting" wouldn't prevent the CV player from still seeing their target. The CV player continues to receive "team spotting" like other players.