Also, I'd like to add sidechain input to envelope detector - this would allow whole bunch of interesting effects.
I did sidechaining in nitro years ago. Basically you send two panned signals (sidechain and carrier?) route your sidechain to the envelope follower and then use the envelope follower to modulate a parameter on a operator that your carrier(?) signal is routed to.
Don't have it installed anymore so I can't give exact instructions but if you're familiar with nitro you should be able to work it out.
Having used the plugin religiously at one time I have a few suggestions.
More filters.Improve the current filters - compare the moog filter in nitro to kontakts moog filter, to my ears it (kontakt's) is plenty more defined and sounds nicer.
More filters.New GUI. The current GUI is ok I guess but it is too small (yes some plugins are too big but nitro is way too small) and it can be real (real!) fidly.
I like the routing options in Nitro, definitely one of it's strengths so I think these should be expanded on. More operators (if they are turned off they don't use CPU no?) and I think multi channel inputs and outputs would be nice (I guess this is a bit of a tricky one since no DAW that I have used would handle this correctly but I'm sure you could haxx the mixer in cubase to sum stereo/mono signals to surround and then spit them back up again. One thing to remember is that you can always route two mono signals in, would work for a ring mod).
More modulation sources - proper sidechain; one I mentioned is fiddly to setup, step sequencer/piano roll/arp, improved LFO's; syncing options, note on/off to reset LFO, to name a few.
More parameters per OP (sometimes 2 is not enough).
More distortion options (different curves, types?)
I could go on all day but it would get messy and I think we'd lose sight of what Nitro is; a filter plugin with bad ass modulation and routing (modular?) options with extra effects. Filters (+distortion/overdrive), modulation/automation and modular routing; imo the heart of nitro.
If reversed delay hasn't been explained I'm guessing he meant a delay similar to a reverse reverb?
++bit crusher/sample rate converter