The general public wont remember the name issue, its just up to us fans on whether or not we want to acknowledge the whole situation.
are we still having this conversation................does it really matter? it wont spoil you viewing by any means and it was just an error from the last film. move on!!!
Is it impossible to imagine that, in a world of probably MILLIONS of robots, there is more than one Devastator? I don't see anyone freaking out that there is more than one Kevin around.