Okay, this explanation might be a little long....
When I first saw it, I thought it was cute and funny. Obviously, it caught on. I mean it's so great ..."Mousekeeping" instead of "housekeeping." Very, very cute. Then I thought what it might be like to be a housekeeper and be called a mousekeeper. I don't know how to explain it.
I think the envelopes for tips are cute and everything. I guess there is no harm in it. I even printed some out. Yet, trying to put myself in an employee's point of view, especially a person that cleans for a living, it seem that by labeling the person a "mousekeeper" one is doing just that--labeling them, and, of course, this housekeeper is a person first and foremost--not a mousekeeper. But since we are all vacationing, everything is magical and Disney and mouse-oriented, so by not paying attention to that, we are being patronizing--basically, because we can use whatever label we like (cute or not), being in the customer position.
Housekeeping is really hard work, and I think that it's especially important that anyone in a service position like that is looked at as a whole human being. It's not that the word is necessarily bad or anything--the whole thing just seems a little condescending. A long time ago when I was in college I used to clean. I think if I was a housekeeper, I wouldn't like it. That is just me. Guess you'd have to do a mousekeeper survey to know for sure!