Here is a pic of my current mitersaw station. It slides out and locks for use, and slides back to stow. In addition to the small vac hose on the blade guard there is a 6" DC line in the cabinet below.
Something to think about- you don't need a fence with a mitersaw- they already have one. It is short, but that is all you need to support the board. Try using a long fence with a warped 2 X 4!
What is nice to have, however, is some sort of stop for repetitive cuts and also a fixed measuring tape if you trust those. I will add something similar to what I had in my old shop (see below) except it will ride it T-track under the lip of my bench. I plan to make it easily removable- it will be similar to miniature Unifence casting. A quick twist of the locking lever to remove it from the T-track. I'll put a wider chamfer on the front of my bench where I will attach the tape- easier to see than a tape on a fence at the back of the saw!
Here is a pic of the mitersaw station in my tiny shop in my former house in VA.
I was really short on space, so I elevated the miter bench to save main bench space. I removed the widow and mounted the slider in the opening and built an insulated box on the outside. The MDF table was built like a torsion box. I built drawers for the voids. A measuring tape is on a chamfer at the the front of the mitersaw bench. A homemade stop rides in a slot.