The aerodynamic crutches on the Hawk are no worse than any of its contemporaries and possibly slightly superior. It has relatively vice-less handling and considering it was about 2 years from napkin to first flight with very little tunnel testing it turned out quite well.
Apart for the initial fixes to the wing - fences and vortex generators and the dorsal side plates, fin filet and a cure for the pitch down due to airbrake it has acquired a modified wing section from the 60 srs onwards, SMURFS to counter the phantom stall that a full span flap vane introduced and has also have had tip missiles fitted, extended nose section, ability to use combat flap as well as a single seater version developed with no major adjustments which would suggest a fairly good basic design.
We hear very little of the airframes in new designs, much more is made of the systems they carry which could be made to work in any airframe. I wonder how they measure up to the low weight of the A4, the low drag of the Buccaneer and simplicity of the Hawk?