Tami:
The likely reason is that older figs are less vigorous. Less vigorous because of lower nitrogen, less water, and perhaps more root bound. Or just the fact that the top has caught up with the root volume, pot or soil. If I understand why the quality is lower and I potentially have control at some point then I'm not concerned. I'd still like to taste the fruit as soon as possible, good or bad. But that's just my opinion.