I posted on another post in this forum about not being able to play squads since upgrading to ps4 from ps3. It was deleted, and a post from FlavaSpinkes was there asking about my friend and myself upgrading ghost from ps3 to ps4.
I had major problems with Black Ops 2, when it came out. Now I can't even play against my clan on squads, and my clan leader upraded to ps 4 also! This is the last game I am buying from Activion!
Thanks for posting! Can you please be specific as what issue you are having with squads? If you are referring to where the Squads game mode is located, it is in the main menu when you start the game below the Multiplayer option.