Its definitely up to personal preference with all the controversy regarding 'housekeeping' and security lately, but I personally have decided to only tip a small percentage of what I previously would have before the series of bad policy changes by Disney. It still depends on the length of stay and if there was anything particularly crazy that made their work harder than normal, but on a typical 3 day stay now I only leave a couple dollars and a note explaining (if this is the case) That I appreciated the service, that I was satisfied with it, and would normally have tipped ___ dollars. However, since I am so strongly against the poor implementation of the 'do not disturb'/housekeeping as security daily 'room checks', I do not think its appropriate to tip excessively for something that I do not want, and lowers the quality of my stay at the hotel and Walt Disney World in general.
I know in general it may not be the housekeeper who is getting the tips fault, but the policy is still effecting my trip, and I won't pay for the 'privilege' of getting barged in on, treated like a security threat, etc. While I doubt the policy in general will change, maybe eventually if enough guests are upset about the terrible implementation, and enough cast members are also upset about the terrible implementation, Disney will sit down and actually figure out a way to do what they think they need to do in a way that doesnt upset guests and is consistent with the quality most people have come to expect with Disney.