Having reviewed the text, I think it can be split into the following changes:
1. Referendums are removed, instead there is a senior chamber elected by the (renamed) Senate whose approval is also needed for laws, amendments, and impeachment. (Citizens still have a right to vote in referendums though
)
2. The Delegate can also veto amendments.
3. The Chief Justice chooses their own Associates.
4. The Delegate appoints the Chief Justice, rather than nominating them to the Senate for confirmation.
5. Senators access to the Senate can be denied with the approval of the Speaker instead of the Senate as a whole.
6. Senators require the affirmative approval of the Senate to join it (following an application process).
And in terms of renaming:
1. The Senate becomes the Chamber of the Four Winds.
2. The Delegate becomes the High Guardian.
3. The Cabinet becomes the Chamber of Guardians.
4. The Speaker becomes the Master of the Four Winds.
5. The Lieutenant Delegate becomes the Hand of the Guardian
6. The Court becomes the Court of the Balance
7. The Chief Justice becomes the Master of the Balance
8. Associate Justices become Oracles of the Balance.
I'm not particularly enthusiastic about any of these changes
I'm prepared to go along with getting rid of referendums, but I'm worried that adding bicameralism would lead to conflict between the two legislatures, particularly as Elders apparently must by definition be members of the C4W.
I don't care either way about whether the Delegate can veto amendments. I am curious as to why this change is suggested, though.
Having the CJ choose the Associates strikes me as a bit odd: doesn't seem to actually limit their power.
Having the CJ appointed without any confirmation process strikes me as seriously iffy. Particularly given the previous.
Letting us block Senate/C4W access with just the permission of the Speaker strikes me as dangerous also. The Speaker could consent to blocking their opponents from the Senate, and then they'd never be voted out... Just seems messy. Having it be the consent of the Senate leaves room for the Senate to specify sensible procedures for blocking disruptive Senators.
I have no objection to making the Senate self-selecting. The confrontational Senate Application process was often great fun, and it'd be interesting to see it come back. That said we'd want to keep the confrontations from becoming actually unpleasant: they should be fun on both sides.
I do however have a problem with the Senate being self-selecting
and the Senate selecting the Supersenate. If the Senate's self-selecting, the Supersenate / Chamber of Elders should, I think, be selected by the citizens as a whole.
Edit: Re: Names
I'm dubious of the name changes because I think people might find them confusing, and difficult to abbreviate. "Master of the Four Winds" is much longer a title than "Speaker" for instance.