Multiple Layer Styles + Stroke Improvement

This is a combination of two suggestions: firstly, the ability to add multiple instances of the same layer style to a single layer, and adding a line join option for strokes.

Let's begin with the ability to add multiple layer styles on the same layer. I feel this is self-explanatory, and believe that this would greatly benefit many users and save them the hassle of continuously precomposing their layers to simply add more stylization, especially for things like typography that require more than one (or two) strokes. Let's also add the ability to duplicate (CTRL D), copy, paste, and name these styles so we don't confuse ourselves.

Speaking of strokes, I love 'em! Not only can you apply them anywhere, but you can even change the stroke alignment. However, one issue that keeps having me come back to the default text stroke option for text, and leaving me with no option for practically anything moving, would have to be Line Joins. Why aren't these here yet?! They're in the text tab (image shown), so why not add them to layer styles?

Thanks for readin' y'all.