Fix up wording in proposal etiquette

specification/proposal_etiquette.rst

@@ -4,17 +4,16 @@ Proposal Etiquette
 ------------------
 
 Proposals **must** act to the greater benefit of the entire Matrix ecosystem,
-rather than benefiting or privileging any single player or subset of players
-- and must not contain any patent encumbered IP.  The Matrix core team pledges
-to act as a neutral custodian for Matrix on behalf of the whole ecosystem,
-just as it has since Matrix's inception in May 2014.
+rather than benefiting or privileging any single player or subset of players -
+and must not contain any patent encumbered IP. Members of the Core Team pledge to act as
+a neutral custodian for Matrix on behalf of the whole ecosystem.
 
 For clarity: the Matrix ecosystem is anyone who uses the Matrix protocol. That
 includes client users, server admins, client developers, bot developers,
 bridge and AS developers, users and admins who are indirectly using Matrix via
 3rd party networks which happen to be bridged, server developers, room
 moderators and admins, companies/projects building products or services on
-Matrix, spec contributors, translators, and the core team who created it in
+Matrix, spec contributors, translators, and those who created it in
 the first place.
 
 "Greater benefit" could include maximising:
@@ -27,8 +26,8 @@ the first place.
 * the number of independent implementations which use Matrix
 * the quality and utility of the Matrix spec
 
-The guiding principles of the overall project are being worked on as part of
-the upcoming governance proposal, but could be something like:
+In addition, proposal authors are expected to uphold the following values in
+their proposed changes to the Matrix protocol:
 
 * Supporting the whole long-term ecosystem rather than individual stakeholder gain
 * Openness rather than proprietariness