I don't think it would be that popular with most players. Players of private servers have come to expect an easier ride compared to retail servers and usually the server needs to make these kinds of rate changes to be competitive with the retail server if it still exists, or other private servers. This couldn't be more true than with Iris Online since the retail server rates were just horrible. It took so long to level a character, most players tired of the game long before they reached max level. Also there was really no content in retail, so it made sense for them to keep players grinding their levels forever to hide the fact that there wasn't really much to do once they hit the level cap :P
Adding a new server with the reduced rates wouldn't really work with such a small population, but I have seen some games that allow you to choose your rates when you make a new character. I'm not exactly sure how they work but I guess it just adds some permanent hidden buff to your character that reduces or increases rates of experience gain, money etc. It's quite possible to do that with our server but I'm not really sure it's worth spending time developing such a thing, but it will be interesting to see the results of your poll.