Would it be possible to get a Drag-and-Drop function when editing crpl in this game if it comes up? like a menu to the side with basic commands like setcreeper where you can drag it into your code and it will drop in the section of that code with (i don't remember what it actually looked like) ex. setCreeper(amount,x,y,z) so that you dont have to remember how to type it up or which words are capitalized, they would already be right there for you.
C/PRPL is not case-sensitive in CW3/PF, save for things like "Omni" and "PULSECANNON".
With that note being made, I agree that we need at least an argument list for each command. My personal inclination is against the graphical forms, but to each their own.
I think one of the mods that Kajacx has does autocomplete, no? Check the list of (currently) pinned topics in the Shipbuilders' board or touch base with Kajacx.
CRPL/CW3 has also autocomplete here: http://knucklecracker.com/wiki/doku.php?id=crpl:overview#creating_crpl_scripts
Creating CRPL Scripts