I may be wrong in this, but I believe Sprint has to already have signed a deal with Samsung by now if they were to sell the Note/Journal. So any petition while helpful, may not be necessary. Either way I signed it as well a while back.
As for it being a LTE device only, due to the fact that Sprint has said that they will not issue anymore Wimax devices, I believe it when I see it. They said that statement yet they are offering the new 3G, 4G Wimax, 4G LTE hotspot coming soon as well. So it may be possible for them to pull a rabbit out of the hat and offer a multi-radio Note/Journal. At least I hope they will.