Great work! I like it a lot! There are a few areas that could be improved, in my opinion:
1 - Font Sizes: In the settings menu. The fonts on the left panel are larger than those on the right.
2 - Filter Icon: The icon for the filters is misleading and resembles a sorting icon. The OBS default filter icon is great because tells the intended function.
3 - Color and Button Styles of control dock: The blue colors and 3D style buttons in the control dock seems "Windows XP" and out of place. The modern and minimalist style of the buttons in the transition menu, as well as the properties and filters buttons, looks more professional. Uniforming a similar design to the control dock buttons would enhance the overall aesthetic.
That's my 2 cents!