Although the Goldswords are here to stay (no way GW will junk new plastic kits) and are fluffy (for those of your guys who like fluffy) I would still prefer to have the footslog Knights back into the army book.
The old Footslog Knights (were they called Tectonic Knights?) were gold. Full Plate armor, hand weapon + shield makes them 2+ / 3+ at 12 points each.
From the business perspective, they can make Footslog Knights a Goldsword upgrade. (and release a new plastic kit for them).
Footslog Knights can essentially be
WS 4 / S4 / T3 / I2/ A2 / LD8
*Champion gets +1 A*
Stubborn
Immune to Psy if character is attached to unit
Able to take Magic Banner max 50 points
Special rule: Tough; If Footslog Knights didn't move the previous turn when it gets charged this turn, it gets +1 T for 1 turn.
Goldswords stay how they are, but they get +1 S for the 1st turn they charge (or get charged)