Mike,
You asked, "Can anyone speak to the work that D.A. Weibring did at Cedar Crest and Brackenridge Park?"
I can't speak to either, but I can surmise from the fact that the new management group that has taken over Brackenridge Park and their plans to complete renovate the course in hopes of bringing back as much of Tilly's original design as possible, that at least someone isn't too thrilled with the work that Weibring did there.
Also, another great Long Island Municipal course, is the Red Course at Eisenhower Park. Site of the 1926 PGA Championship and the Senior Tour's Long Island Tournament...