I bought a PS4 so my boys would stop arguing on who's turn it was on the PS3 and so they could help each other with the strikes and raids only to find out that they could not play together. I can understand the reasoning for crucible but it does not make sense to not allow this for PVE content!! Bungie, please implement cross platform for PVE - I don't think it would be very hard and it would make your game much better.