Quoting WickedDemiurge, reply 8Swift Anklet is incredibly broken and does need to be nerfed (I think deleting them before trying a nerf would be premature), I agree.
The mere fact that a gigantic proportion of all players playing all Demigods take it show that it is overpowered. And the only real way to counter it in many cases is to take it yourself, which vastly reduces the strategy and variety involved in the game.
It is not "overpowered" it is just "very useful".
I'd say that if it is so useful as to get picked even when it has nothing to do with how you will play your character, it's probably overpowered.
Edit: I'm not a johny come lately to this issue. I've thought it was probably too good for a couple weeks. I've used it myself, seen others use it, explored the counters to it, discussed it with other players, etc, and I still think it is too good. I think changing it to +10% would probably make it fair.
And perhaps buffing Saam'El's Cloak to "+5% move speed and Move speed cannot be reduced by more than 15%", so there is a legitimate choice between the two. If anyone took Saam-El's Cloak right now as the items stand, I'd call them a fool.
A speed boost can be easily countered by speed reducing items.
There's only two and both are only a chance on hit, meaning they are unreliable and can only be used in circumstances when you can auto attack multiple times (so, not fleeing). Worse yet, speed reduction is generally worse than a passive speed upgrade, as it's far more narrow in its uses. Swift Anklet gets you to the Healing Crystal and back faster, Poisoned Dagger does not.
Fuck with me when I'm Regulus and I'll lay my lvl 4 mines on your ass and it won't matter if you have swift anklet or not, you're dead because you can't move.
Not everyone has powerful ranged slows like Regulus. And most importantly, levels 1-9 matter quite a bit.