Here's a small extension that automates the die reroll if a character has the 'Elven Accuracy' feat in 5e
It's been tested in my home campaign and doesn't seem to conflict with any of the other extensions my DM uses, so hopefully you won't have any issues either.
As ever, if you find any issues/conflicts then let me know.
Cheers, Steve.
*Edit* Added fixed version of the extension to fix a bug found by Klandare
*Edit* Added version 1.2 for compatibility with the 5e Combat Enhancer
*Edit* Added version 1.3 for compatibility with combat stats and elven accuracy extensions and also a bugfix.
*Edit* Latest version 1.3.1 , which provides compatibility with Kent McCullough's Pack Tactics Extension. Revision kindly provided by Kent.
*Edit* Version 1.4 posted, removing superfluous code and providing better compatibility. Thanks to TheoGeek for his help.
*Edit* Version 1.5 posted, a small update to fix a bug with how the dice were handled in Unity
Forge link here Elven Accuracy