I’d always liked to have a scripted clone like tool, with an interface to control clones (like the clone plugin) but still the possibilty to manually offset a certain clone.
So 1 a flexible clone tool.
A flexible sanity check script which you can feed a customisable (is that a word!?) xml or somesort of ini file.
So 2 a preflight check tool
And 3 a menu framework to control the building and removing of scripts and menu items.
I know the last 2 are somewhat production specific, but it would still be interessting to see what people come up with.
My 2 cents,