That list is huge. I can certainly pick up a couple, but some of them look horribly outdated; is it an option to delete the ones that haven't been updated in - say - 12 months just to bring it down to a manageable number? It would be a waste of resources to spend time on a package that nobody is using anymore.
I'm afraid it's not possible to remove old and unmaintained packages, unless e.g. the upstream is dead i.e. the source is missing: https://mailman.archlinux.org/pipermail/aur-general/2013-June/023923.html
[sorry, accidentally hit Send too soon] Can we create a "zombie / placeholder" status for those packages that need to be kept as Xyne mentions: " Even if the PKGBUILD is an ancient relic from the age of Judd in need of a complete rewrite, we tend to leave them as placeholders." I just don't think it's feasible to maintain all packages that were created once upon a time, since *anyone* can create a package on AUR?