Which is what I've pointed to in the past as the reason I no longer use RT - I was a user waaaay back from when Gabor was solely responsible, and a huge advocate for years - and I've been shouted down for saying it: RT has become primarily a coders' playground, and far less, a photography tool.
Nothing wrong with that, but I continue to maintain that until the unnecessary (I use that word deliberately and advisedly) complexity is robustly addressed, it will continue in the direction in which it has been inexorably heading since going Open Source - more and more an offputting, overly complicated (for no obvious advantage) niche product with little to attract most photographers.
Rob mentions Photo Ninja up the page: quality of output apart (and like Rob, I'm a PN fan), it too has some very clever, very versatile coding, but it's hidden from the user, working as it does, behind the scenes of an apparently quite limited feature set and UI: this allows the photographer to focus on results, without having to deal with and work past the almost guaranteed (unless you coded it) paralysis of RT option overload.
They really need to add some tutorials. It may be irrational, but most people hate reading software manuals. Several 3-5 page tutorials, or youtube tutorials, would go a long way to helping people understand what all the weird features are. The number of tools in the ciecam02 section for example. What is it? Why does it need all these things? What is the difference between the normal sliders and this section's versions?