I just got back from five days in Rainier NP (will post trip report in a couple days, after I get caught up on some other things). I hiked Northern Loop + Mother Mountain Loop + the three Burroughs. Plenty of snow across Windy Gap (not on WT) and on the Spray Park alternate route that many people take on WT (I did, when I hiked the WT several years ago). No need for axe, although north side of First Burroughs was a little hairy. A little routefinding across Windy Gap, and would have been across Seattle and Spray Parks, but there was good boot print there. Not too much traffic--getting on the trail before 7am, I usually could go all morning without seeing anyone. Talked to two solo hikers and a couple who were about to finish the WT--no real problems reported.
My starting weight was ~15#, wore Inov8 295s, and used poles. Every other hiker I saw was traditional, with boots and big backpacks.
Snow is melting fast. Bugs are bad in places.
Here's pics of a trail sign in Berkeley Park, from 4 Aug when I started, and 7 Aug when I was back at Sunrise: