Swappolube came from Hawaii's optimizations. Most of them are similar to yours, however they were more along the lines of reducing occurances of I/O in general, and reducing swapping when not necessary. Swappiness was set to 30, and a few other changes were made. dirty and dirty_background ratios were put really high, and he didn't reduce the queues... Eventually someone packaged those changes as "swappolube" as a script, then it got made into a GUI program. Anyway, the difference is hawaii's original mods aimed for a I/O less, I/O in efficient bursts approach, where as you seem to go for a I/O often, so that I/O doesn't build up.

That said, I personally have been fiddling to get my own combination of settings based on those original mods.What I personally want to see is as little swap as possible while I still have ram space, but I don't want it to zealously abandon swapping the way it would if swapping is made zero. I'll fiddle with this myself, let you know if it seems better than what I'm doing.

It seems more in line with what I've been trying to do, which is keep as little memory as possible from being forced into swap, while still allowing for swapping when it is 'needed', since the smaller queues and the smaller dirty ratios would help keep it from accumulating dirty pages.

I'm having stellarium downloading one of the more massive (8 of 9 I believe) catalogs right now over wifi, so I don't want to fiddle too much now, but I'll get back to you when I get that over with and have had time to write the changes to where I want them, and then rebooted.