Like it might sound strange coming from me, but I played systemless freeform games for way longer than I've done any kind of MU play at all. The reason I personally go with a more coded approach now is just wanting to make sure there are tools to let players create RP and drive story, and facilitate their finding RP. I definitely don't want people to feel overwhelmed, but it's a hard thing to balance since some people really do want something more like a sim (RPI style where everything is coded), versus people who feel an intense dislike to coded systems due to feeling like it's a roadblock rather than a help to just finding RP and really hate having to work through new systems.
The goal I think is to make things as intuitive and easy to use as possible, and that's a really hard, ongoing struggle that pretty much doesn't stop ever.