SWAP mode is more of a novelty. It only really works with ASCII, and even then it turns a lot of original UI design on its head so I'm not sure whether it could ever really be a highly usable mode.
There are quite a few things that would need to be addressed as special cases for it to become "good," so because of the amount of work involved I'm not sure how many more tweaks it's worth making to that feature. (We'll know a bit more about this next release when I look at stats again, since the score sheet collects render settings and we can see how popular the various filters really are.)
Regardless, I'd be happy to look into specific usability issues for anything more easily tweakable since you're apparently already getting something out of SWAP. (I find that mode very hard to parse myself, but everyone's different
)
Thanks for the heads up I'll check those out!