I have a K30 and EX. The EX is direct streamed from the K30. I have the EX set as player/server running MPD with an smb link to a folder on my K30. This allows for MPD to be direct played without streaming through a remote app. i,e. mconnect. I use this for my PGGB library
If the player in the K30 could be set to player/server than this link could also be created.
MPD in direct play mode is superior in sound (imho) than squeeze and roon/hqplayer.
I am glad I kept my EX when upgrading to the K30 and would have chosen the S line if not as the separates are much more flexible.