Bethesda have decided to remove players' ability to move at abnormal speeds by limiting the frame rate to 63 frames per second. They have also fixed the FOV but options for ultra wide monitors still work, even though they are not official.
PC players have found it to be really easy to cheat in Fallout 76 and while Bethesda's oversights are many, the company has reacted quite fast in fixing some of them. Then again, it's unclear whether the 30 GB patch is simply a short term solution or Bethesda's final choice on how to deal with the matter.
If it proves to be the latter, it will definitely be disappointing. While locking the frame rate at 63 FPS will solve the speed hacker issues, it will also, well, lock the frame rate. Therefore any players with 75Hz or 144Hz monitors will not be able to use their hardware to its full potential.
Other players have managed to mess around with Field of View earlier, providing them with advantage in certain situations by giving them better view of the are, as well as probably minimising their motion sickness induced by camera shakes while running.
That option will no longer be possible either, as Bethesda have locked Fallout 76's FOV to 80 in third person now and can't be changed through fiddling with the .ini file or otherwise. First-person FOV is still stuck at 90.
Thankfully, the FOV still gets somewhat changed when you manually change to ultra wide resolution, so the UI elements will be where they are supposed to. These fixes have been swift, but they seem to be more of a band aid than a proper service update.
There is only one beta event left on PC before Fallout 76 launches on 14 November 2018, and it remains to be seen whether Bethesda were right to slap a full AAA title price on the game. With the current amount of glitches, cheating vulnerabilities and performance issues, it doesn't look good for the next entry in Fallout franchise, but full reviews should be pouring in within days.