Lately I have noticed a trend of being against applying a new skin or theme to an existing game. This is for board games and video games, but I personally never really saw a problem. I think it is actually a good idea, providing you don’t try to charge full retail price again.
It allows people to tell new stories or apply a new theme without going through the whole development process again. It also allows people to add some new minor rules to better reflect the new theme or to fix some problems from the original game and incorporate feedback. The new stories is probably more applicable for video games and the re-theming for board games.
These advantages let games skip a big part of the development cycle. It is also lets them explore new ideas with a more adventurous note than simply a second edition or HD re-mastering. That being said, I can definitely see how it can be an excuse for lazy design or a cash grab.