I'm pretty sure it is, what the formula means is that det is only valued more than it was before but not enough to surpass crit. Crit is also meldable in larger amounts as a crit 4 gives 9 instead of 6 per materia.
The AA formula "increased" the auto attack damage at max level by about 20 so instead of it being calculated as 450 it is calculated as 470 the percentual increase in DPS is 4% for the AA and lower for the overall DPS. As for stat weights my guess is that it is has gained about 0.05 closer to crit but this only makes big enough off a difference for min-maxers.
As for if anyone can confirm this, he is perma banned from the forums. But if you want you can try this out yourself, calculate the expected damage with both formulas and then see which one matches your in game damage the best.