I’m so glad to see you picked up by Steinberg. I was an early user from back in the days of Divide Frame. I’ve purchased every version since Spectral Layers was first released. Nothing else does what this program does.
My primary use for the program is in audio enhancement and clarification. Which brings me to the question, and I’ll ask it the long way around.
I still use SLP v2 for my enhancement work. I can create layers for noise removal, attenuation, and gain using polarity inversion only. It is so fast.
Choose a layer, select something, preview it, add to the selection or subtract it with Undo, then commit and it is copied to the layer. The selection is based on the aggregate audio on the screen. You can always see the current stage of your work.
Best of all (especially for legal work), nothing is truly deleted. Only the polarity is reversed so any layer can be soloed to verify that only unwanted noise was reduced or removed. The source layer is never touched, so it can be soloed as a reference at any time.
The selection tool does double duty. It limits the area that is being worked on by the brush or frequency selection tools. It can also be used to copy and paste blocks of audio to a layer.
Every version since then has been a step toward a Photoshop-like approach where audio is selected from the source layer then copied or cut and pasted to another layer. The selection tool does not work as a boundary any more. It’s just another tool.
Even when the audio is shown as a composite, it doesn’t mean that a selection can be made from an empty layer. The user has to always go back to the source layer, which still contains that loud noise that was inverted in another layer, or still contains that road noise that was attenuated in another layer. This leads to the temptation (especially for attenuating noises) to perform destructive editing on the source layer, which necessitates making a copy of the source layer in advance as a reference.
I know that all of the changes and versions you have made are as a result of user feedback and probably the first couple of versions were a little geeky for the average user. But if you ever decide that you might want to make a separate version of the program for the kind of non-destructive use that v2 uses, you can count me all the way in.