Glentress still screwed, Innerleithen's probably worse. Kirroughtree is apparently ice free and lovely, shame it's in the middle of nowhere really.
The ice was shrinking in the pentlands on sunday and most trails were rideable in a manner of speaking, but it'll be mud central now- so time to avoid all the good, fragile trails. I could see people were still merrily riding through the mud on pistachio and the nail trail, makes me a tad annoyed that, it's not even remotely fun when it's muddy so why mess it up for when it dries? You could still put together a loop of surfaced/durable trails though, it'll just not be very exciting but it keeps the legs moving.