We all miss the old layout but trust me you’ll like this one better after you tweak it a little bit to your liking.
You should already have this.
Go to the FrankerFaceZ Control Center
Navigate to Appearance > Theme on the left.
I use “#0E0E0E ” for the background color. This is the best color in my opinion and recommended by FFZ.
The Old Font
The old font was
"Helvetica Neue",Helvetica,Arial,sans-serif so slap that in there. You can copy/paste it easily with the text under the settings in FFZ.