New user questions

[kaledi]

So today I discovered MinimServer for the first time, having used a competing product for many years. MinimServer appears to be very powerful, but I'm trying to get my head round the technical features and ways of optimising its use. I have a few questions I hope will accelerate how will use it.
1. I have 3 separate folders that contain audio. I've added all 3 locations, but when I navigate via a controller (Heos app), I'm presented with the separate folders, rather than the content of the 3 folders merged into one collection. Is there anyway round this, or is this deliberate and by design.
2. Is there anyway to customise the navigation tree, so for example, I want to presented at the top of navigation with the choice AlbumArtist, Title, Artist, etc. I can get there with Tag view, but it takes several presses on screen to do so. Can Tag view be customised?
3. Heos devices have an irritating issue where the artist field of a track playing from a Various Artists album will show the artist as Various Artist (i.e. Album Artist field, rather than artist field), is there a workaround? I've tried using AlbumArtist.replace={Artist} in tag value. This seems to work well for Various Artist albums, but not for tracks that have Composer populated and then this is shown rather than Artist.
4. Finally, can multiple instances of MinimServer be running on a Synology NAS, so that multiple libraries, or subsets of a library can be navigated?