Eh, I'd prefer it if Jackson never got shot than if he just survived his injury. Takes out all the recovery time. I suspect there is no re-organization, and the Army of North Virginia remains on offensive footing longer. This probably buys the confederacy 3-5 months, and the cost of another 10-30k
casualties.
I think that you are underestimating the effects of having Jackson at Gettysburg, especially on that crucial first day. He would have seized Cemetery Ridge on the first day and that changes the whole tactical situation. He was an aggressive commander always looking for ways to confound the enemy. A victory at Gettysburg does not guarantee a CSA victory in the war, because President Lincoln is not going to give up the struggle unless forced to do so, but it might give the CSA French and British recognition. I do not think either nation will enter the war, but they will guarantee loans and all those warships will get released. What happens then................who knows!