I'm not sure what Lester and I disagree about on the Mac Wall. I have proposed, both here and directly to the Preserve Anchor committee, that certain routes be designated as one-pitch routes, and there are some obvious choices on the Mac Wall. There are also some multipitch routes that have been turned into one-pitch routes by rap anchors; perhaps that is where we disagree. I think these routes should be restored to multipitch status by eliminating the rap anchors.
Originally, all the Mac Wall routes went at least as far as the Three Pines GT Ledge. It was customary to climb to that ledge, unrope, and solo down Three Pines. After rap anchors went in on the truly one-pitch routes, Dick chose not to mention the unremarkable climbing up to the GT ledge.
As for Broken Sling, as Lester says, there never used to be a rap anchor at the end of the first pitch, so the anchor installed there is in violation of the Preserve's 1987 regulations on no new fixed anchors, and is not one of the legacy anchors that climbers are entitled to maintain. This anchor should be removed and should stay removed. Apparently, it seems to be removing itself.