I'm with Mike on this one, softshell's great on mountains, but for bushcraft it's not really my first choice. Andy Kirkpatrick has some very interesting reading on that site. It's not to everyone's tastes and he perhaps doesn't give as much credit to other systems as he could, but it's interesting reading nonetheless.
If you want recommendations for softshell kit my first choice for upper body wear is Paramo; most of the year I'm in their adventure smock with the torres smock for insulation while I'm slow, stopped or sleeping. For me they're about perfect; the adventure has all the features I need (venting, map / compass pocket, fixed hood, etc) while the torres is warm warm warm. The aspira is also brilliant for colder conditions if that's the way you want to go.
Lower body I'll go for either montane or paramo cascada trousers depending on where I am, when, and what I'm doing. I will however often have a pair of thin hardshell waterproof trousers in the bag too during the winter. If I'm going to be in gullies, sat belaying for a while, or digging snowholes or the like they do come in useful.
Why don't I wear them for bushcraft? For me they're a bit too technical. They're not cheap and I don't particularly want to ruin them pushing through a forest or, as was pointed out, from sparks from a fire. But more than that bushcrafting's not really the high energy activity they were designed for. I don't need all the quick venting, I don't need map pockets... I'd prefer to wear something a lot cheaper and harder wearing, in my case usually CS95 kit. Plus I like the extra camo.
Saying that mind I know Buffalo 6 shirts are popular in the forces so people DO use it...