Interesting, I assumed that both Mute and Unmute would be quantized. Especially when combined with muteMode=Start quantizing the Unmute would be necessary if you wanted to keep multiple tracks in sync. But since the EDP doesn't have multiple tracks, it's less interesting there.
The way quantization works is in the process of a complete redesign to give you much more control over it. Besides selective quantization on/off behavior for Mute, it will allow different quantization settings for each function, so you could have quantized Mute but not quantized Replace if you wanted.
You can do all that with scripts if you would like to start exploring that. I'll post an example...