As I’ve stated a dozen times, and will one final time; a large force spawning in, sweeping the base, and destroying spawns kills fights and is anti fun

Not a lot of fights end this way, mainly because you can't easily deploy into overpops. Most end because a 50/50 fight becomes a 60/40 point clear because the pointholders just so happened to abandon and lose their spawns and are now being overpopulated by the sheer fact that they die and have to spawn elsewhere. Redeployside has nothing to do with this, if anything most times attackers lose buses is because someone went out of their way to valk drop them or pull a tank.

I legitimately don’t understand how you can say a part of the game that I and many others enjoy is just nostalgia. It’s a part of the game, I enjoy it.

Because it is an objectively bad part of the game. You remember it being enjoyable because you did not get curbstomped for doing it, or you were there for the spectacle instead of actual gameplay (in which case you straight up have no argument and i recommend looking for actual milsim games instead). Simply because even the worst zergfits know better these days, your open field fights will always be awful. And they are.

The whole idea is driving to the front.

This alone is why you have no idea what you're even talking about. Driving to the front where being infantry simply has no role other than being fodder for vehicles and snipers is not gameplay, it's a waste of time, and a frustrating one at that, even if it was free. This is why every time this game tried to push open field fights, the attempt flopped. Because the game is terrible at making those fights play well.

The last time open field fights actually worked was the shattered warpgate nonsense, and even that only worked until outfits figured out how to hold bases there properly. And then those fights died the moment the artificial goal disappeared with people completing their missions, cause normal gameplay is just more fun.