The meta this year is encouraging swerve drive, but it's a lot to ask of young teams to put eight motors on a robot.
Let me introduce you to synchro-drive (https://groups.csail.mit.edu/drl/courses/cs54-2001s/synchro.html). In its simplest configuration, two motors drive all the wheels on the robot: one turns them all synchronously and one spins them all synchronously. This is done using belts and your favorite flavor of right-angle gear chain.
It does have the one unusual property that while the drive train can drive in arbitrary directions, it can't turn the chassis. So for FIRST Robotics, one would have to couple it with a solution for swiveling whatever end-effector your robot has to finish the job. And slippage on the turn chain would be killer because there's no way mid-match to turn the wheels independently of each other. But if you can tolerate the challenge of keeping tension on your belts or chains, this can be way fewer motors than swerve.
Video of a synchro in action: https://www.youtube.com/watch?v=nurCA5Q4_hw
