I'll just add my 5 cents
1. Ability to copy nodes in graph editor (under right click like current delete node option )
2. Ctrl + Z is a must in my opinion..
3. After detaching material node from my mesh node, I get an empty dot in graph editor, but there's no material in node inspector list and sometimes it's really hard to get around in the scene...
4. Probably the biggest request - PLEASE add more camera response setups.. there are many of them available in the net...
5. Maybe more tweaking options in Post Production, like Curves etc?
6. Is it possible, to add an option of storing all the rendered data in one file and ie. resume the render later on?
7. If the pt. 6 is correct, would it be possible, to separate the emitted light and GI to layers (or any other method) and than play with their energy in Post Production (like it's done in Fryrender or some other unbiased engines) ?
Sorry if any of these points was mentioned earlier, just wanted to share my opinions

It's not my "wish list" but simple thoughts I've gathered from several months of working in a few latest releases. In my opinion these could simply improve and expand the every day work-flow. Octane is a great piece of software, but still hope U'll develop it more and more
Hope devs visit this thread, or is there an other place for posting user's suggestions?