I can attest to that.
Unlined collars/cuffs. I really like how they look/feel. I specified a Mercer button-down collar. It doesn't quite resemble a Mercer collar (I think) when buttoned: the collar has to be longer (not the points) and the collar buttons have to be moved slightly closer to the middle to form a bell shape, but the roll is generous and looks way better than the previous button-down I ordered.
I don't think it's that easy to replicate a collar anyway -- but I'd like to say Luxire has done extremely well.
I almost have the fit nailed. The next order will have a larger chest measurement and slightly larger armholes.