Hi Will,
You shouldn't need to apply the default features (+kern, etc.) as you are doing there; luaotfload should be applying them automatically, unless I'm mistaken.
I want to do like this with lualtex and luaotfload:
\usefont{EU2}{fxl}{m}{n}\selecfont
some text with numbers 0123456789
{\addfontfeature{+onum} and old style numbers 01234567890}
By
Michael
