I suspect that AZRR knows full well about the fatality last summer.
From my limited experience with the area, I'd say:
Sure, it's a long haul into Grizzly Creek any way you cut it.
Navigating the valley bottom will be interesting, but do-able; we were able to follow game trails through some of the brush, much to the surprise of some of the sizable local bear population.
Trying to gain the ridge will be a puzzle that will probably only be solvable once you get into the upper valley. The green and cliffy areas on the photo above are steep and rugged, though weaknesses exist.
Where the red line, proposed route, turns north and traverses gulleys, ridges, and notches looks very problematic. Then the real fun starts.
As others have mentioned above, dropping down the Goode-SK col could be troublesome. I'd suggest having a double rope rappel available. When I was there w/ Heienrich (early July 2001?) it was pretty nearly a full 60m from the snow to the col, and very loose; I wouldn't count on good anchors, and downclimbing would be a nightmare. We may have a good snowpack which could help, or recession may have made the descent longer.
All in all, it sounds like quite the adventure, and I wish you all the luck.