Nope. The edge is still there. You're just not touching it while holding the phone because the case extends it outwards a few mm.Wouldn't a case defeat the whole benefit of the Edge screen (if one wanted that benefit) ?
Yes the edge is still definitely usable I just haven't set mine up yet I've only had the phone in about 24 hoursA nice case makes the edge quite nice, I didn't like it bare, now I really enjoy the phone.