As many having been saying, Dead Dog is in and was very nice last Monday, when I climbed it. I saw another climber who had ascended via Kelso and he said conditions were good as well. Two groups of skiers ascended Dead Dog with me, one before and one after.
There are super nice steps kicked all the way up DD on the right side. Snow seemed soft outside of these steps, so you'll endure significantly more effort if you deviate from them. There was also a decent sized rockfall during my ascent which did not appear to be caused by the climber on Kelso nor the skiers above, but rather from natural thawing. Pay attention and listen for missiles.

Southpaw was OUT. Huge cornice covering the whole top and significant recent avy evidence.

Lost Rat appeared to not go all the way to the top, so the top may turn into a bit of mixed. Having not done the route, I can't attest to difficulty of the rock.