I can see why that initial singletrack climb would be excellent backwards but the rest of it I can't imagine being any better? Are't the rest of the singletrack sections downhill (when ridden the right way)?
well, I might have made similar speculations prior to riding it, but the proof is in the pudding. If you only define 'good' as downhill then you might not like parts of it the wrong way – but I found them more interesting to ride that way.
BTW I forgot to mention, the duckboard section near the end now has strips of what looks like wet&dry abrasive strips on each board, making it easier to ride when wet.