Instant-runoff voting (what here is called RCV) may be a route to PR.
But in history it seldom does.
The city of Lethbridge (Canada) did switch from IRV to PR in 1929.
But even using semi-proportional system such as Cumulative Voting in Illinois 1870ish-1970ish - did not progress to move to PR.
and CV uses multi-member district same as any form of PR.
IRV because it retains single-member districts, does not lay great base for move to PR.
but if other choices are nonpartisan redistricting (of singe-member districts) and national popular vote (to elect single post of president), it may be best of poor lot. (But yes, combine national popular vote with IRV for best fairness of election of president, if the logistics permit.)
PR can be brought in without "restructuring legislative bodies"
-- any system that elects multiple members in a state can be converted to simple district- or state-based PR system, simply by:
make district state-wide and elect all the state's members at one time (such as Senators), and
give each voter one vote, and
make that vote ranked, like in RCV
and you have PR, of the STV version anyway.
local rep. would be enhanced because in any state that has at least three members, any quarter of the state that votes just for local candidates and marks its highest preferences just for local candidates will elect somebody local, and there would be nothing the other voters could do to stop it.
Instant-runoff voting (what here is called RCV) may be a route to PR.
But in history it seldom does.
The city of Lethbridge (Canada) did switch from IRV to PR in 1929.
But even using semi-proportional system such as Cumulative Voting in Illinois 1870ish-1970ish - did not progress to move to PR.
and CV uses multi-member district same as any form of PR.
IRV because it retains single-member districts, does not lay great base for move to PR.
but if other choices are nonpartisan redistricting (of singe-member districts) and national popular vote (to elect single post of president), it may be best of poor lot. (But yes, combine national popular vote with IRV for best fairness of election of president, if the logistics permit.)
PR can be brought in without "restructuring legislative bodies"
-- any system that elects multiple members in a state can be converted to simple district- or state-based PR system, simply by:
make district state-wide and elect all the state's members at one time (such as Senators), and
give each voter one vote, and
make that vote ranked, like in RCV
and you have PR, of the STV version anyway.
local rep. would be enhanced because in any state that has at least three members, any quarter of the state that votes just for local candidates and marks its highest preferences just for local candidates will elect somebody local, and there would be nothing the other voters could do to stop it.