I'd argue that adding a TLD to the internet is certainly not the "no change" approach to deployed DNS infrastructure. While they've avoided the necessity for software to be deployed, they've added the necessity for a TLD to be added to the root zone. Just ask the homenet people how easy it is to get your own personal tld enshrined in an RFC and added to the root. The other alternative is via ICANN. Good luck.
As many people have pointed out in the IETF DPRIVE group, being observed using a privacy service may in and of itself represent a risk to the user. And the ODNS model will allow any spying entity to easily harvest logs for .odns destinations from compliant recursive operators or from their own network observations.
I applaud their efforts, but would caution against any assumptions that this will be easy or secure enough.