
Prerequisite: Dexterity of 15 or higher
You have learned to change your weapons and fighting style in a way that is fluid and requires little effort.
Gain the following benefits:
- Add 1 to your Dexterity with a maximum of 20
- Switching weapons does not cost an action and counts as a free action.

I would limit this to once per turn, otherwise, it doesn't seem plausible and some shenanigans come into play.
Well it isn't like someone is going to just have 5 different weapons on them and switch between each before an attack. That is something at a DM could regulate but even so, it shouldn't be possible to have more than 3 or so weapons on a single character without racking up your carrying weight.