WPI specifically built a new building next to the arena for the
FRC pit area, and for other more minor sports things for the rest of the year.
My small suggestion is a clock to hang next to a small white board with your scheduled matches. Yes, everyone has a clock on their phone, but it's easier to glance at the wall clock when you're up to your elbows in robot guts and your next match is in five minutes.
Half the years our programmers stood at a high desk built for that purpose; other times they got a corner out of the way and sat on a crate at the end of the table. One year our programmer sat
on the table with the laptop next to him. As long as he is out of the way of the hardware crew. The programmer should be on the side of the robot where the cRIO and robot on/off switch, to tether quickly.
An "L" shaped pit gives maximum area for the robot/cart and walk-around. We have a display in the front corner (with programmer tucked in behind), battery cart/dump table, tall shelves; along the back more shelves, tool chests, and crates. It changes year to year of course.