AHC: More "Democratic" Virginia Constitution of 1830

With no PoDs prior to the 1828 referendum calling for a convention, how can the malapportionment of the General Assembly giving undue power to the richer planter class in the Tidewater (or conversely, under-representing the western part of the state) be as diminished as possible?

CONSOLIDATE: OTL, this convention had some pretty big name attendees -- Chief Justice John Marshall, former Presidents Madison, John Randolph of Roanoke, Thomas J Randolph, and for a time James Monroe (who was initially presiding officer, before withdrawing due to ill health). Would increasing or decreasing the level of involvement for any lead figures be enough, or a good start, to meeting the OP?
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