I'm a Ning 2.0 owner from way back, I closed my site in 2015 becaause of Facebook. I truly loved how eveything was so configurable, even member individual page, SO MISS that. However I digress.
I hightly recommoned that Ning goes back to the number of visible posts on a page again, up to 20 or so, and selectable in the "Sites & Pages" portion of the design studio.
On active sites like mine, a LOT of posting is done in a very short time, members (and I) hate clicking through pages instead of scrolling.