Thank you both for your replies 
@huwred If Umbraco can load from multiple locations, then surely I should be able to add more locations.
The docs for runtime compilation of RCL also states this should be possible and yet Umbraco still doesn’t resolve the folders, even with an additional file watcher defined.
@LuukPeters I don’t think that is the case anymore.
AFAIK views are compiled and made part of the DLLs now and not physically present on the filesystem as separate entries.
As for that case, I did test copying the files to the build output folder and verified their folder structure matched what I would expect
The compilation of views are also noted to be on be default in the Microsoft docs, which makes it hard to believe they wouldn’t be included in the build output: