As a tourist, I don't usually plan time specifically at Disney Springs -- especially not if the parks are open late -- but I do end up there at least once or twice per trip.
As far as shopping malls go, it's a really nice one. I can't imagine spending many hours, but it was useful when I needed a new pair of flip flops and found the Sanuk store. Or grabbing a dessert at the Ghirardelli shop. There are some fun restaurants around for late dining after the parks close (depending on the time of year you're there). The Irish pub, Raglan Road, has a great band at night, a nice selection of beers, and excellent fish and chips. And I'm looking forward to trying out the crab cake at the Boathouse someday. It looks incredible. To be honest, if I lived in Orlando or if I really enjoyed shopping, I would probably be more excited about Disney Springs. Your mileage will vary.