Bell Curve is more like The Duckworth-Lewis Method in cricket. (If not worse!) Everyone is aware of its imperfections. But for want of a better alternative, everyone hangs on to it.
Thankfully, some global companies, known to be people-oriented, are taking the courage to dump it.
Till such time a "new, improved" method (with all its jargon & complications) comes on scene, we got to see if we can be more professional and at the same time empathetic to staff. It is not impossible to look at some simple methods, within organisations, that will suit them better. It need not be complicated, to confuse intelligent folks at an organisation.
Simplicity is a great virtue!
Let us treat employees as 'human beings', at its holistic level!