Someone reminded me of this during our usual mathematical arguments over lunch.
Replacing pi with a value twice it's size would seem to be a zero-sum proposition: it makes circumference calculations "more natural" at the expense of area calculations, and makes radian considerations easier at the cost of complicating the periodicity of the tangent function.
Even so, I say we go with it for two reasons.
First, it will set a precedent whereby I can double the amount of grant money I can apply for, on the grounds that the increased figure "seems more natural".
Second, it will really piss this guy off.