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1. A server implementation MUST NOT turn on compression by default; instead, it MUST enable a server administrator to turn on compression if desired.
Any particular reason to use RFC 2119 language here (and in 2+3). Otherwise this LGTM.
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3. A server implementation MUST enable a server administrator to limit the amount of bandwidth it will allow a connected client or peer server to use in a given time period.
We have that already in http://xmpp.org/extensions/xep-0205.html#rec-bandwidth so if this repeated here (which seems like a good idea) there should be a reference.
