For the OOP approach I'm basically following the unrealscript-style of coding. What you have here is a set of existing classes that each does its own job. Now in order to use the scripting language all you have to do is place instances of the classes, initialize them with appropriate parameters, and let the existing code do the job. This is certainly better as users can focus on script usage rather than script design e.g. having to write their own code from the bottom up and then be stalled by a number of bugs present in their scripts.