In Bell's defence (or is it defense???) - the Bell 430 had suffienct tail rotor authority at the worst condition of wind at maximum weight at 7,000' Density altitude. (I did some flight testing with them when I was at Transport Canada).
And there is limit to what you can do with the tail rotor - put in such a big tail rotor that it really eats into payload.
There is, for example, no requirement in the regulations to be able to maintain heading while climbing vertically at maximum torque - should this be a requirement? Or should it be to maintain heading with winds up to 30 knots? or 20 mph as it currently is?
and Nick - I think you'd be surprised how many helicopter pilots never look at performance charts!