Take a look at those Warriors rosters. You should notice names like David Lee, Marreese Speights, Anderson Varejao, David West, Zaza Pachulia, Kevon Looney and Chris Boucher, not to mention Kevin Durant, to go along with Bogut, McGee and Green.
While the focus with the Warriors was arguably the greatest backcourt of all time (something the Suns don't have, as good as the Booker and CP3 pairing is), the Warriors never lacked for size except when they unluckily were hit badly with the injury bug. They never went into a single season with JUST Green and either Bogut or McGee. In fact, many of their rosters were actually TOO front court heavy.
That being said, I am clinging to hope that James Jones, like Sarver, recognizes that our primary need is quality size up front that can provide rebounding, rim protection and interior defense, and that he will actually get quality size to fill it. However, the facts that this need was every bit as obvious the last two years and James Jones ignored it (or did far too little to fill it while bringing in an unnecessary surplus of guards and wings), combined with the only free agent name presently connected to the Suns being a one-dimensional outside shooting wing, have me very nervous heading into this free agency period.