First of all hello community and thank you for this fast new ELEC.
I have a HifiberryDigi + board installed on the RP3 that works on OE. I tried manually configuring it on a fresh install of LE and it didn't even show on the audio settings. Funny thing is that I got it working by first installing OE, configuring the Hifiberry and then upgrading to LE with the .tar file.
I'd like to know why I needed this workaround.