The lower the dropoff, the longer it will take to get your rewards to fully mature and you'll need to mine for a longer time period to reach equilibrium.
I wouldn't say that. In the language of
the triangle, lowering the dropoff moves you away from the black line and into the blue line; while the black line is characterized by low maturity time, it can still be arbitrarily decreased on the blue line.
The main advantage of using aggressive parameters (high dynamic fee, low leakage) is decreasing the variance of small pools.