Overdrive and MKP are two totally different things so one can't replace the other. I've used 2 bottles of OD and tried side-by-side growing with it and saw no difference. After mid-flower some K, Mg and S are what finishes them off best for me. Epsom Salts takes care of the Mg and S and I have potassium chloride, 0-0-62, for a bit of that.
Too much P is what causes most of the 'chem' taste in overfed plants and very little should be used after the stretch period when the plants feed at their highest levels so don't wait until week 3 of flower to add boosters. Start those a week before the flip and back off after mid-flower to pre-flower levels of feeding. The only growth is the buds and they don't demand high ppms to fatten up.