1. Drawable Waveforms: Zebra 2, Wusikstation, these both have this feature. Kinda cool to play around with I guess.
2. Preset Morph. FM8 allows users to assign different presets to a mini xy pad near the top of the window. It's called the morph square and it's pretty nice
3. Drag n Drop modulation. I know I'm probably going to get flamed for saying his, but Circle and Massive have a really intuitive way of assigning modulation (in my opinion at least). You basically drag a little box or circle from the modulation "source," and place it on its target. For synthmaster, it could just create a new entry in the mod matrix that could be played around with from there.
4. Graphical Modulation. NIs Razor has its knobs display the available "range" that modulation targets are assigned to. You could easily see, for example, a large filter sweep because a little blue ring around the cutoff knob would be stretched across most of the know. Of course, you can also tell where the knob is exactly at any given point in time by the head of the knob.
5. Lock envelope curves. The envelope curves are great to have sometimes, but other times, you may bit want to have the envelopes change exponentially. Here it would be nice to double click the curve know to disable it.
6. Better mod matrix navigation. Sometimes, it can be difficult to find a specific envelope because it is nested in several folders. Perhaps the targets and sources could be better organized so some were easier to access.
7. Format filters. I know this has been requested and is planned.
8. Factory partial presets: basic envelope examples would be great to have just as a starting point.
9. Oscilloscope. Nice little feature that'd be cool to pull up from inside.
10. Spectrum Analyzer. FM8 has a constant one up in the top, which is really handy when recreating other sounds that have been analyzed. Also, the ability to draw your waveforms by harmonic content via a spectrum analyzer would be great, too (I believe Zebra let's you do this)
