Compare the formula for D-19 vs D-72 (a Dektol-like published formula);
D-19: Metol 2.2g, Hydroquinone 8.8g, Sodium Sulfite 100g, Sodium Carbonate 47g, Potassium Bromide 5g, water to make 1 liter.
D-72: Metol 1.6g, Hydroquinone 6g, Sodium Sulfite 22.5g, Sodium Carbonate 34g, Potassium Bromite 0.9g, water to make 1 liter.
The most important issue I see is the much higher potassium bromide level in D-19. This will effect image tone and may restrain the developer enough to make it hard to get deep blacks.