So I know this request is over two months old, but here's a response.
Your question inspired me to create a plugin that basically does what you wanted - an X-Y grid with attack on the horizontal and lowpass on the vertical. There's a slider for resonance (the Q of the lowpass) and a slider for transient sustain.
Feedback is welcome, this is my first real plugin that I've written in forever and it's got a GUI and everything, I feel so fancy. Sounds pretty good with mid-tempo mixes and a few drumloops, so I'm calling it ready for release.
edit: a few bugfixes and dialed back the gains
https://stash.reaper.fm/v/36681/translow.txt