The thinking regarding Wawa as far as I know, is that because demand at Elwyn exceeded the available parking before and since the lot was expanded, Wawa would be the logical location.
My completely unverified opinion is that the ridership at Elwyn is riders from Chester county down Rt 1, those from the areas on the South side of West Chester, along with the local area.
Riders from the north side of West Chester that I know personally, are going to Exton/Malvern/Paoli.
Wawa has advantages. Available real estate for parking and a storage yard.
Relocating the storage yard should also allow for expansion of parking at Media, another area where demand exceeds availability.
Talk all you want about Transit Oriented Development, old habits die hard.
People will bitch about gas prices, but the bottom line is until it becomes completely unaffordable, transit is about convience for those that have a choice.
For me, cost is not a factor at this point. My choice to use transit is a matter of convenience.
While I don't have to do so regularly, when I do need to go into the city, I will use transit when possible so I don't have to fight the traffic or worry about parking. In fact, parking is usually the sole driver for me.
My work schedule currently is off hours, so rush hour traffic is not a concern to me. It's all about time. If transit gets to the point where it is faster than driving, then I'll be using it.
I don't have to use transit.....make me WANT to.