I dig all the nuances and subtleties between all the different Vader versions. I'm that geek that likes pointing out all the variations. Just the other day I was like, "As you can see this Vader is distinctly different than these 37 other Vader figures. The horizontal, as opposed to the vertical, stitching on his gloves as well as the elbow joints and unique paint job on the revealed Anakin head make him different."
That's part of the fun in it for me. Yeah it's a problem.
But really, you have to have a Vader figure come out regularly. We as long time collectors sometimes forget there are new people coming into this hobby all the time. (Quite a few leaving too.) One could argue, Vaders should be delegated to the Legends Line. Even so, if you were new to the hobby and wanted to pick up the Vintage line to keep carded, you'd want a Vader packaged as such. The real problem, in my mind, is when Hasbro has the same character running concurrently in two separate lines.