To implement IP obfuscation it would push Evolution back about 2-3 months, then we would use it in v12 for about a year, then throw it out as soon as evolution came along, then I would have to redo the work again....What sense does that make?
We've had this discussion before and in a practical sense, trying to protect the IP addresses of the existing masternodes is pretty pointless when there is a high probability that owners aren't magically going to set up a new instance to get a fresh IP... rather sticking with their existing IP and as such, the masternode list of IPs is already easily available.