Is there any kind of official Creation Kit guide?

[noahdvs]

It might not help you edit melee swing rate, but I've added some info to the talk section of the weapons page. By the way, if you want a melee weapon to swing automatically when you hold the attack button, enable the Automatic flag. For guns, Repeatable Single Fire allows more flexibility, but it won't work on melee weapons. Melee weapons will swing slightly slower when holding attack than when mashing attack though.

http://www.creationkit.com/fallout4/index.php?title=Talk:Weapons

Edited May 2, 2016 by noahdvs

[mwhenry16]

YouTube has many unofficial guides already, and it has the series of "official" Skyrim CK guides as well. And since the "new" F4 CK is the same, it is relevant.