There's practically no downsides to the gun is what I'm saying, well priced and great for both close and long range. A weapon that comes with basically no weakness will make skill less important.
There's no risk to buy an AUG instead of an M4.
Compare with the AWP, it can be very effective, but it comes with a great risk because it costs so much and a lone player with the gun can be overwhelmed because of low rate of fire.
Not so with the AUG, it's just an overall better gun, there's basically 0 reason to buy an M4 any longer, which is a more balanced gun.