IMO it's always strictly better to use something real, like LUA. WoW uses lua as a programming language for user interface and users can make their additions (addons and macroses). A lot of users, who don't know anything about programming, can successfully use those lua snippets.

Also when real programmers have to interact with those systems (and my practice shows, that business users don't want to program, they ask programmers to do it), it's so much pain to use those GUI languages or whatever and it's so easy just to write some code in sane language.