Parts of it are probably too steep for skiing if you were to stick to the climbing traverse (which I have not done), but get out there and check it out, avalanche and snow conditions permitting. I’ve skied in a day from Emerald Bay over Maggie‘s, Dick’s, and Pyramid down to Twin Bridges. Used a car shuttle. Have fun and pray for more snow!
did a traverse starting at Echo Lake, skiied up the east side of Ralston and then traversed the ridge over Becker and Talking Mountain back to Echo. Had to carry the skis in places, esp above the bowl over Cup and Saucer Lakes.
also skiied from Loon Lake up the Rubicon over Mosquito Pass and out to Echo in 2 days. good fun but skiing across Lower Echo was a bit sketchy as the ice was pretty thin.
having scrambled around up there in the summer, I would think parts of the traverse from Agassiz to Pyramid would be tough to ski. From Mosquito Pass to Price and Agassiz probably pretty skiable. After Pyramid down to Strawberry (Rocky Gulch trail). Lots of slabs east and SE of Pyramid down to Horsetail Falls and could be quite avalanche prone.
another option off the top of Pyramid is to ski down the west side and head somewhat SW to the old Forni place and hence to Wrights Lake road. The forest is a bit more open that way as i remember and not as steep as going down the last part of Rocky Gulch Trail.