"Note that, because registries will be contractually mandated to support RDAP, and that if they choose to continue supporting WHOIS they will be subject to additional uptime/monitoring requirements on WHOIS that they wouldn't be if they simply dropped WHOIS, most are planning on dropping WHOIS as soon as possible."
No, there are no changes on that one, it's solely a technical change on how the registration data is delivered (switching from a freeform* ASCII-only bespoke protocol to an HTTP and JSON-based machine-readable Unicode-ready standard).
* Although there's some unwritten standards on what data should be on an WHOIS, in practice it can be wildly different especially on ccTLDs and IP addresses.
https://news.ycombinator.com/item?id=35907769
"Note that, because registries will be contractually mandated to support RDAP, and that if they choose to continue supporting WHOIS they will be subject to additional uptime/monitoring requirements on WHOIS that they wouldn't be if they simply dropped WHOIS, most are planning on dropping WHOIS as soon as possible."