GW takes too long. But this is what you do. You allow players to choose one of two difficulties: normal or hard mode. Normal mode is the GW but without protection on you or enemies and hard mode is what it is now.
They both give the same awards EXCEPT that hard mode opens up another unlock for achievements and eventually Darth Vader. Bam, no more complaining, no more whining.
Everyone gets the same awards and if you decide to put the extra effort into it (what is about two hours of GW) then you get some more vader. Because you let them decide which difficulty to choose, they wont whine as much.
Just make sure I get the credit for the idea ;-)