I think even if they are different software Otoy should take note of what the other developers are doing with their render engines, in my case I think they should explore how marmoset works with assets and elements in the viewport, and how software like substance designer handles nodes and connection ports or even the c4d plugin node editor is a step up (these giant nodes with a super small name are botering me), also those vertical node connections damage the read on the graph flow ... but these are just my opinions.
in general octane and marmoset are similar in the way that you import your geometry then light and prepare the look in the software, marmoset is "simpler" as is aimed at realtime preview, but it let you know what is happening in your scene at any time, you can see where your lights are, where they are aiming at, they are easy to select and work on, marmoset possibly never will achieve the scale and detail that octane provides but artist amaze with their work, the platform should and must ease this, not put obstacles in every corner, not every artist has the technical knowledge to know the month day or even year to put a sun, or even technical knowledge to code or solve the issues that doesn't require artistic eye, artist just want to create (of course this extra knowledge is beneficial but should not be necessary)
I dont know about software development, but a toggle overlay for object icons in the viewport or even a button to show wireframe will suffice to show where you elements are at, a toggle button for gizmos for elements such environments, projections (please this) and light directions will be extremelly useful.
marmoset also has something that working in conjunction with other software such photoshop or substance painter not a nightmare, reloading geometry and textures are done when you change programs windows, it simply updates the file when you get back to it.
anyway I think octane could be better, the small things are what the software is sloppy at, the software is a beast produces incredible good images with small effort, but when it get super technical I personally hit a wall.
Octane render for c4d but moving more toward standalone with one 980ti