I use DO and XY. In XY I can script whatever I want, while in DO I spend a lot of time learning the scripting language. Simplified scripts make it easier for people who don't know how to programmatically edit scripts (that's me...). For example I just need to see the help file for script parameters and examples, and then I can edit the script.
Opus has names for all of its commands. That is easier to use than cryptic numeric identifiers that you have to look up in a table somewhere. Your request does not make any sense if the aim is to simplify things. What you're asking for would make things more complex and harder, not easier.
If you aren't sure what the command for an action in Opus is, just edit the toolbar or menu it is on and you can find the command that way. It will be something like Set VIEW=Thumbnails instead of 3072374. I know which one I find easier to understand.
I know that all Opus commands have names.
But if it is a large custom script, or multiple Opus features, scripts, the ID is simpler, just use ; to separate, or is there another way?
I like to use the ahk script, assign a key in the AHK script and restore normal keystrokes by killing the AHK program when not needed. There is also the use of mouse gestures.
If you want a list of commands, that is what the default menus and toolbars are already. You can look through them to see various things you can do, and you can edit them (via Tools > Customize Toolbars) to see the commands they run if you need to find them out.
The manual has more comprehensive documentation on the commands and arguments. It would not be possible to provide a simple, complete list of every single command as that list would be infinite. (For example, you could have a button which navigates to C:\My Folder and another button that navigates to C:\My Other Folder. We can't list every possibility as a simple list, since you can add any path you want to the commands and the list of possible paths is infinite.) But if you want a simple list of typical commands, you already have it, in the menus and toolbars that come with Opus.
Maybe look at User Commands and Script Add-In commands, they are both ways you can extend the built-in command set to add your own functions. You could even give your custom functions cryptic numeric names if that's what you really want.