First thought it was the only option. Yet, you are right, cash grab is probably a poor choice of words.
This being said, offering a slightly retooled Vader seemingly mixing pieces of a Vader released a couple years ago and one merely months old though marketing, arguably, the best of the two worlds is certainly gonna drive mad the completist buried in most of us.
Gonna drive the perfectionists mad too.
Even having the ANH Vader with RO gloves I don't have the light-up saber that works with those gloves. Then on top of it there's the issue of the gloves not fitting perfectly over the suit.