Alter an Anthem?

Muling over trailbike vs xc racer. I have Giant Anthem 1. I'm pretty sure it's 80mm travel. Been wondering if a trail bike would be more the style I ride, I'm not a racer, more of a bushwacker. Read more!!!!
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The August Mountainbike Action said about the Diamondback Sortie:
The 71° head angle made for some sketchy navigating at speed. This could be improved with a more aggressive front tire, a taller fork or a wider handle bar. ...

They suggest the following to alleviate the above:
The longer fork (from 100 to 120 travel in their case) would slacken the head angle, lengthen the wheel base a tad & give more control (via suspension travel) on speedy descents. They felt the “adverse effect on climbing performance would be minimal.”
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The Giant head angle is listed at 72° close to the Sortie. I recently went back to the wider handle bar it came with (thanks again Jay). But could a taller fork help my Anthem 1 handle steeper terrain more like a trail bike than a xc racer?