Also try raising your bars slightly. Longer bikes need higher front ends to enable you to properly weight the front end.
My personal experience is the exact opposite of this.
When I got my Trek Fuel EX I also found I was washing out the front end more than I had on my previous bike.
LBS suggested lowering my handlebars to help get more weight over the front wheel, and that certainly helped me.
But before you do anything else (handlebars, different tyres, etc) just drop your tyre pressure. That will give you lots more grip. I did lots of experimenting when I got my bike and settled on 22/25psi (front/rear) on 2.4 tyres (which need higher pressure than 2.6s, all other things being equal). Below about 18/20 it started feeling pretty squirmy. In two years and 5000km (including lots of rock gardens at You Yangs, etc) I’ve only had one puncture at each end (at same time) that sealant didn’t fix. Rear wheel has taken a hit at some point, but still fine to ride, and I reckon that was probably when I got slack at checking pressure and was likely only running ~15–18psi.