To be far to Vin though he is pretty much the only reason this series still exists. I was sure they were done after Tokyo Drift and he pretty much brought it back to relevance by himself. Does he have a huge ego now, especially with this franchise? Sure, but I feel like its warranted. As much as I like the Rock his ego is just as big and I feel like that's where this issue comes from. The Rock is going to own Hollywood soon with his production companies and all the shit he is doing behind the scenes. Vin probably doesn't, and won't, give up his franchise to him.
I thought it was good too. The submarine shit was even more insane than the plane, which is saying something. I'm not a fan of Eastwood's character though and also agree that the Rock/Statham scenes were some of the best in the movie. I'm sure in 9 they'll get back to more of what got them here instead of this one off.
Oh and I think Vin said they switched it from a racing movie to a heist movie with cars because it's a much larger demographic that enabled them to reach a wider audience. Seems like these billion dollar global openings prove him right.