I like them separated. CA and SA attract largely different groups of hobbyist. There is some overlap but as people gain experience, you usually see a divergence.
I can see why the purist would like it separated, but it has turned out to be a huge task. Im pretty sure the SA section still has 2000+ posts to go through. Most of my experience comes from african cichlids so there's alot of times where I have to google a fish to see where they are from. I was moving some threads the other day, just to come back to new posts in the wrong section.
This sounds like a reasonable, and less time consuming solution, as/and if old threads are reinvigorated, moving them to their proper spot .I think if we leave them split, the idea should be to separate new threads and leave old ones buried. Too time consuming for a few volunteers to do all that.
Most available and "most popular" cichlids like Heros (Severums), most Geophagines, Apistos (other dwarfs), Angels, and even Oscars, and other Amazonian types are much healthier in proper water conditions (neutral to low pH) very unlike the waters of Central, pH above 7 into the 8 and 9 pH (north America) and, are ill equip to share tanks with the much more aggressive north American cousins.