Don’t know about the bugs. But eOS is created with los sources, so if los sources does have bugs, eOS will.also have.
Build doesn’t start because of missing make files. So I stop here for the moment.
EDIT: I’m sorry, I have build eOS with the sources from XDA / comico. But it isn’t booting 
I have written a post on XDA but I think there won’t be any help (I never have gotten help on XDA)
EDIT: it’s booting now [CUSTOM BUILD] Pi/e/ test ROM for Galaxy Note2 (N7100)