i dont know about new feature about XE8, but is it worth that we follow every version of Delphi ? searching for every new components version too :|
From long history of Delphi, the odd version is the most stable.
"Dude, I just found this XMPP library for Delphi, might work with Rad Studio XE 7 too: https://github.com/taybin/xmpp. Haven't tested it myself, but if you're stuck, maybe it's worth a shot."
Haha, что за язык? Don't worry, I know some Russian. For your XMPP protocol component in Rad Studio XE 7, have you tried using the Exolab XMPP Library? It's an open-source library that supports XMPP and might work for your project.