I have driven through Philadelphia twice - new York to washington DC and back, in summer. So, I don't undertsand the climate, and can't comment on what is best in Philadelphia. However, there may be value in posing an obvious question.
From the information I've seen here, and the TV vision of Philadelphia Sea Eagles home games, I assume the weather comprises of occasional summer periods involving intense heat and humidity, whilst the winter periods invovle sub-zero temperatures (minimums and maximums) and infrequent snow. I expect the spring and autumn (and much of the summer) is quite mild and pleasant. Houdini would be well qualified to grow quality grass year-round in such climates!
If that is so, then
the ideal maintenance meld would be designed to accomodate these two extremes of temperature. So, what is the best combination of grasses/soils/irrigation/drainage/light and air/etc etc for most-of-year-round play, able to recover from the winter and survive the extremes of summer?
I'm sure there are other maintenance combinations that provide a better surface in one season or another, but that would involve trading off playing conditions for much of the year for the benfit of a shorter time period. Of course, members want the best, every day, especially if some course down the road is better this month.