I've been messing around with my FF29; trying to get a setup I like. It loves smooth trails but I was struggling to get anything close to a playful feel on rougher stuff. It rolls over stuff fine, but didn't want to play and I never felt confident on anything technical (not helped by a few crashes). I followed the current fashion for short and wide; ending up with a 50mm stem and 740mm bars with a 40mm rise. So short wide and high, but still no joy.
So, I gave up; accepted that it was an XC bike and not a trail bike and stuck on a 100mm stem and 680mm low-riser bars. Even lowered the bars a touch for that XC bum in the air feel. Well blow me down it now seems much more playful. OK, it's still an XC bike, but against all my expectations (and almost defying logic) it seems much easier to move the front around and generally more balanced and stable on rougher trails.
I'm thinking that having my hands that bit further forward (rather than under me) may make it easier to push the bars forward and get the front up. But I also wonder whether it is something to do with the relatively steep head angle on the FF29. Is the current fashion for short and wide driven by the fashion for slacker head angles?