Sorry, I misunderstood your point mabian.
The generic UI shows the correct value because you are setting the value at that moment when you move the slider.
Reaper says: plugin, please set your parameter to 0.234234234. What formatted value is that? "-35dB left"? OK we will write that next to the slider.
For an envelope tooltip, Reaper can't say that. Reaper has to say: plugin, what would the formatted value be if I set your parameter to 0.234234234? If the plugin says "duh, I dunno" then all Reaper can do is write 0.234234234. If the plugin says "I support number one top most excellent Cockos VST extensions and therefore I can tell you the answer is -35dB left!" then Reaper can write that.
Which is the whole point of this thread
