The benefits of using the tool from
http://www.flawlesswidescreen.org/ pretty much outstrip the hassle of using a customized ba2 files, unless you know what you're doing and can edit them yourself. Believe me, I held on to using modified ba2 file up to 1.4 and finally realized that 90-95% of what I needed was in the memory hack (the tool above). After backing out all the screen modifications I made in the ini files, it works great in every game patch since. I am using Surround in 5760x1200.
The Flawless Widescreen tool is easy: Download and install it. Run the tool and click on Fallout 4 in the Available Plugins. Change options as you see fit but you should be fine with defaults. Make sure this tool is running on your system at the time you start Fallout 4. Very important.
Quick edit: I did actually keep a few edits in my ini for workshop icon sizes. If it helps, here's what I put in my fallout4.ini file under [Interface]:
fNoteDistance=12.0000
fBookDistance=36.6667
fWorkshopMenuItem3DScale=2.0000