Personally, I'm a traditionalist. Three Lights, three Luminaries, and three Consuls. Scrap the Regent and make Archons non-voting unless we just scrap them too.
Enter amazing grew-up-on-a-farm analogy: Sometimes you need to trim a tree to keep it healthy, but cutting away too much can kill it all the faster.
If we had a ton of active people, sure. But we don't. The traditional eldership is too large to go back. As for the status quo, taking some of those select few active nobles, and giving them titles where they aren't supposed to involve themselves too much (justiciars), does the Church no good.
At this point I've pretty much lost faith that there's anything we can do to salvage SA.