Here's an interesting little counterpoint for everyone.
I bought the ultimate edition of FH2 shortly after it came out. My console has been set as my Home console this whole time. Just as many of you have responded, my wife, whom I share my Gold account with, could use the DLC but she did not have the VIP perks. She had to pay for the cars that I got once for free, she was not receiving double rewards on the wheelspins, etc. But the DLC content was fully playable.
Fast forward to about 2 weeks ago. Her game save got stuck trying to sync (for a second time now), so she decided to start over. Now, we BOTH HAVE FULL VIP PERKS.
I don't recall seeing any updates come through. Nothing was out of the ordinary except for her having to restart her game from the very first event. But she's consistently getting double rewards and she's picked up a number of free cars that she's wanted for a while now.
Maybe something was changed and it's a sign of things to come? I don't know, but I have my fingers crossed.