[JesseK]

Swerves are fairly heavy, and to lighten them without ever actually doing one before means a team risks quality. Mecanums are the 'easy' way to upgrade during the actual season, because if all else fails with the code you can easily just tank steer like usual. Additionally there's aren't any tricks to mounting a Mecanum wheel since it goes in the same spot as a normal wheel.

The BEST is definitely crab this year*. Yet just because that's a probable reality doesn't mean your team should do it. It's complicated in both hardware and software.

*AFAIK. YMMV. Only applies to certain strategies. See the other robots at your local competition arena for details.