One small problem I'm having. I'm playing the game on 3 monitors (my resolution is 3x1920x1080) and the new HUD elements seem to ignore the [Interface] INI settings. My HUD is centered, but the e.g. "Grenade icon" is off to the right monitor.
In particular, the UI should obey these settings from Fallout INI
[Interface]
iSafeZoneXWide
iSafeZoneYWide
iSafeZoneX
iSafeZoneY
Unfortunately I'm not really sure how exactly these values translate to pixel offsets (but I do know e.g. iSafeZoneX is how many 'units' the HUD is from the left-most edge of the screen). It also affects the main menu. Dialogue, pipboy, bartering, etc is already centered and unaffected.
Also the masks stretch across 3 monitors, probably not much you can do about that without writing special multi-monitor code (don't bother). Personally I wouldn't want to have the side screens blacked out when wearing a mask, I guess the mask could be center screen only (and side screens no mask) but would that be weird? Or you could just make the masks obey the iSafeZone settings. Keep in mind the default settings are iSafeZone*=15 (15 for all 4 parameters)