3 degree is fairly average and provides for an arrestable sink rate. Transport category Aircraft will consume considerably more Tarmac when reaching min's and trying to arrest the sink rate from a 3.5 degree G/S and greater.
Some Aircraft with lower Vls/Vref speeds are able to compensate for 3.5 degree and greater by the slower Grd Spd. However at the 140 kt Vls / Vref it would take a very harsh round out to match the G/S touch down area plus 100 m.