In other words, maybe the Stillpoints will emphasize certain qualities and downplay others, but is this perhaps working against the intended design and voicing of the speaker?
Maybe or maybe not, idle speculation can't carry us very far. The company has been around for some time now and continues to introduce innovative products. My Teres turntable came with a set of original Stillpoints and they work well in reducing mechanical vibration. Most of their footers work on a wide range of audio products, not just speakers.
Stillpoints Ultra Mini, Ultra SS and Ultra 5 Footers, and ESS Equipment Rack