Speaking of the TTK, assuming it's in line with MW 2019, as some streamers have compared it, that puts it a little lower than most Battlefield games from at least three and up. I tried to find Bad Company 2, but the only TTK data I could find for it is from an old website where a dude claimed the game had 500 milliseconds TTK, which seems nuts.
Anyway, here's a table someone made for BFV comparing its most popular weapon categories, Carbine and AR, to BF 3 and 4's. Battlefield 1 apparently had a ttk for one gun around 387 milliseconds, while another on the lower end was 280 milliseconds, but that's obviously not on the chart.
Modern Warfare 2019 sits at around 183 milliseconds on average, faster than BF 3's TTK range of 200 milliseconds for AR's. So, assuming that's true and assuming this chart is true, Battlefield 6 is faster than BF 3 by 20 miliseconds, but we truly won't know until some autists do some tests.
2042 Sat at the low end at 200 milliseconds while at the higher ends it would reach the 380s