Anyone have insight into this? It's a very odd perk, in that the entry point is "Set Boolean Graph" with something like "bPerkShieldCharge" (or something similar) as value for that entry point.

For those that don't know, Block Runner makes you move faster with a shiled raised.

I'd be interested in adjusting this, as I'm planning on making it so in my mod the move speed you have while blocking is determined by the type of shield you are blocking with (heavy armor shields at low block skill = no movement, weapon blocking = faster movement at any skill level, etc). Block runner deals with the same kind of logic, but it's hard to see exactly how it adjusts player movement speed.

I'd rather do things the "block runner" way to avoid bugs, but if there's no way to actually adjust that speed (AKA block runner turns out to be YET ANOTHER hard coded effect) then I'll just have to get really hacky with scripting changing the player's speed mult depending on the above factors when they block. I'd rather to not have to do this.

why don't you just make a movement speed spell effect.
that is applied or removed as the player raises/lowers his shield.
you wouldn't need to tweak global variables that way, if that's the kind of bug you're worried about.