I was at ValleyFair last week and it seems very similar to Dorney in some ways and different in others (as you would expect).
Riding Renegade at VF was a blast and is definitely their best and most popular coaster. They definitely don't have the B&Ms Dorney has, but it was neat to see what a nice GCI can do for a park. It was the one roller coaster that actually had lines and people wanting to go back on it again and again. Interestingly, park patrons seemed to tend more to the amusement park side of the park vs the water park side at VF.
I read back since my last post and I do hope they do something with Dinosaurs Alive. I remember last year when we were there, I asked one of the workers and they said it was a 4 year contract as well (ending this year) - so unless they renewed it (which I think they would only do to avoid having to actually do something to the land), I too am hoping for something that offers a little excitement.
I unfortunately don't see a new exciting coaster coming anytime too soon, Dorney just doesn't build up the thrill seekers for the investment. I personally do not enjoy the water park there, way too crowded and unless you have fast pass, you are typically waiting in lines for slides much longer than I can tolerate for a 10 second ride.