I sure hope he explained that to his wife's daughter.
I think 64 really is as far as it should be pushed. I'd even say that 48 players works better for a lot of maps. I learned this when I was an 24 hour Op Locker Fag some years back. The 64 map becomes an absolute cluster fuck, but with 48 players, it actually became possible to break the grid lock and flanking attempts are not as easily shut down.
In a situation like that, your efforts at back capping, attacking, and hunting a specific vehicle player can actually pay off.
The bigger you make the player count, the smaller effect any individual good player can have. Unless said individual is a good attack heli pilot accompanied by a competent gunner. Then the entire game is shut down. 300-500 combined kills with 0-2 deaths. GGWP.
And I don't think a bigger map is a good solution. Look at what happens in Golmud Railway. It's effectively 2 separate games happening in one map. Any bigger than that and it becomes harder and harder to actually affect the outcome of the game and people are gonna care less and less about bothering to push for a back cap or something.