Before I switched my test box to PKGNG, I culled my installed packages using some scripts based on pkg_info.  There doesn't seem to be any good reason why these scripts should now break: I'm sure the new pkg query could be shimmed to provide the same results in the same format without too much difficulty.  Wouldn't such a shim eliminate one more small irritation for people making this transition?  One script I used was depends.pl which does call pkg_info and no longer works.  Maybe this isn't so common as pkg_cutleaves still works for listing leaf nodes.   
Just a thought.
				
			Just a thought.