Re: Sounds like a daft question but... why veneer a 3 piece body - showing my ignorance !
I don't believe Ibanez would add an extra piece to a non-endorsee guitar to hide a seam. For a regular RG series guitar it's possible they might add a veneer to a guitar top if the other two pieces weren't thick enough, though. Pieces are usually added to get the guitar to the proper size spec, and no other reason. I think we've all seen or heard of guitars that were as many as 8 or 9 pieces. The 7VWH has the basswood veneer due to the paint, and no other reason.