As per suggestion from @Bollie I’ve re-purposed the Enable LED/Control to be a “Mute” (bypass/enable is still click-free, but only available in the “Edit Window”).
New version is available from the same URL (http://robin.linuxaudio.org/tmp/tinygain.lv2.mod.tgz and src on github). I guess it won’t be long until this shows up in the MOD store, but it’s unlikely that it happens before the LAC.
PS. The background color of the DPM display now changes depending on the signal-level:
<-18dBFS: pale green <-3dBFS: green <-1dBFS: ocher < 0dBFS: orange >= 0dBFS: red.