The 'problem' is that Syracuse is a small city with a good road network. I live in Camillus and I can get to any other part of the metropolitan area in 20 minutes or less.
OnTrack is hampered by the routes that the Lackawanna and its predecessors selected ages ago. As much as I'd like to see a ballpark service succeed, it's just unrealistic to expect that families (which are the bulk of the attendees at Chiefs games) are going to drive all the way into Armory Square, eat at expensive restaurants there and then pay to ride a train to the ballpark and back when ample parking is available right next to the stadium. Train service to the Carrier Dome works because of the scarcity of parking there - most patrons are forced to park on the fringes of the university and ride a crowded bus to the Dome.
As far as light-rail in Syracuse is concerned - one route that holds promise (really the only route) would be Syracuse University - Downtown - Carousel Mall (er, Destiny USA … if it ever gets built). I could envision a route that loops through the University and medical centers, then travels down Adams Street to the planned Centro bus terminal. From there, it could head up South Salina Street before swinging past Armory Square, then turn north past Franklin Square and the planned Inner Harbor area to the mall. The unbuilt OnTrack link to the transportation center and ballpark could also be used for the trolleys. Ideally, the route would also include a large parking lot off I-81 near the mall to allow light-rail trains to effectively serve as shuttles for major events in the downtown and harbor areas and as a Dome shuttle for sporting events, and a potential branch could also be built going southwest from the harbor area to a second lot near I-690.
Jim