I have an idea on how Bungie should implement account to be able to be linked between PS4 and XB1. Most people like myself don't have the time to regrind everything. I don't think Bungie would want to do it, but here's my 2 cents on what could be done if they put their minds together. 1. If you are switching from PS4 to XBOX One, any exclusive exotics or legendaries should be locked or disabled on XBOX. (A message should say: Requires Playstation or Y3). 2. Any grimoire earned from playing exclusive crucible maps only on PS4, can be subtracted from your grimoire score. Your stats from the PS4 only maps would not count (since the maps are PS Exclusives) 3. Implement some sort of one time account transfer (like Rockstar did with GTA online). Just my 2 cents