You can still center the stance if you want and it's not a tun of a set back. I think it's only like 1/2" so that's not much and it also, I believe has a twin side cut not a directional witch should make switch riding easy. The board is described as a directional "twinish" shape. The SL is supposed to be a great all around board and should be able to handle the park fine. As you progress tho you may want something like an evo or something similar that is softer to play around on to complement the SL thus starting your own quiver you hear people talk about!
This..... I had an SL and just sold it on here. I rode it centered. I did go out and replace it with a Proto because I do like a true twin and the SL was too small for my big ass.