Coming right along!
Yes the soil looks repellant. As for the sphagnum I would wait till the weather dictates.
Expecting hotter temps this year I'm assuming, but I'd wait.
If I were seeing runners, I would say repot now, but I am not.
My Kishu's are running up here already. I have an Itoigawa that is in bad need of potting.
I got it at the Nationals last year and the soil is absolutely terribly piss poor.
It is not running yet, and I have my doubts that it will ever run if it stays in the soil that it is.
Additionally the 2 lowest branches are becoming a bit more confusing with the recent shortening.
I would still leave it on, taking nothing off before you repot. Nothing more than underneath cleanup
of branches. In particular the yellowing shoot.
If the foliage is exposed to sunlight, leave it till after recovery from repotting.