The latest all-mountain soft boot designs appear to have gone back to a board that can carve when wanted. Yet won't hold you back in bumps, deep, or trees.
The Jones Hovercraft looks like a true all-mountain machine. As noted earlier, the Prior MFR is another do it all board.
Carlito's board posted above may be what you're looking for. (and supporting a small local Canadian company)
You may need to try a few boards to decide what you really want, or need. Demo season is coming soon...