Nobody on this forum has done the trip thru Sugarloaf or traveled the trail between Sunset Meadow and Roaring river as much as I have as I patrolled the area for NPS for 9 seasons and have returned several times on my own since then, last time being last summer.
As AT said the slog thru Sugarloaf is a hot, nasty, dirty, dusty, 3 miles. In fact it made me decide to be a stock ranger at Roaring River. If I was going to go thru that dusty trail I'd rather be up on a horse! Unless it was after a recent rain if I walked thru the valley my calves would be black with accumulated dirt and sweat.
That said the traditional loop out of lodgepole is still a nice trip. I would do it counter clockwise. The traiI from Silliman pass to Comanche Meadow is not too dusty. The worst part of the trip is between Comanche Meadow and Ferguson Creek. Schedule yourself to go thru Sugarloaf as early as possible. I would want to be at the Ferguson Creek Crossing no later than 10 am. There will still be a hot 3 miles to Roaring River. Deadman Canyon is a delightful visual treat. If the Sierra continues to get hammered with snow, Elizabeth Pass is likely to have snow in late August, but probably just the last 300 to 400 feet of vertical. And any snow from July on is likely to be dimpled with large suncups. As AT said it is highly unlikely that there will be a cornice. To negotiate Elizabeth Pass you want to start by 8 am from Upper Ranger Meadow, so that when you get to the snow it will be firm but slightly softened.
Good luck and safe travels whatever you decide.
Who can't do everything he used to and what he can do takes a hell of a lot longer!