You can't over expose & pull a Bromide paper with out compromising quality.

There's a very simple answer use Selectol Soft - D165/ID-3. Although no longer manufactured it's a simple Metol based developer and easy to make up. It'll give you nearly a Grade drop in paper contrast.

ID-3

Metol 6 g
Sodium Sulphite (anh) 25 g
Sodium Carbonate (anh) 37.5 g
Potassium Bromide 1 g
Water to 1 litre

To use: Dilute 1+ 3

Ian