Watson is a must for anyone running a Minecraft server, a very handy tool for all your staff members. Combined with Coreprotect, you can easily see where players have found various blocks graphically.
Although this is the biggest advantage of Watson, there are countless other features that, for example, follow a player in the same footsteps to see the correct path.
With such a good overview, you have no problem seeing if players use eg x-ray. I have become so addicted to this mod and several in my team could hardly manage without now as this is a big part of staff everyday work.
Really useful! took a little to learn how to use the client, and it's not flawless, but it has really helped a giant amount with finding x-rayers and griefers. Made it almost effortless and way more fun
Works wonderfully with the Watson mod, has helped in pinpointing a case of where a user took stuff from which spot, as well as what used to be at a place of griefing.