One solution would be to have a new function "org-invisible-p" that restores the old definition of outline-invisible-p. Interestingly I find that an "org-invisible-p" did exist back then, but it was replaced with outline-invisible-p in 2011 ( http://orgmode.org/cgit.cgi/org-mode.git/commit/?id=84d7165d74a5061413168af435d61453be217933 ). Looks like that might need reverting.