Having one Pixelblaze publish sensor data (or other variables!) is definitely on the roadmap. Until then, you can getVars from the one with the sensor board, assuming it runs a pattern that has exports for all of the sensor data in question, and setVars to the other Pixelblazes.
Apr '23 edit: Now you can use the new Sync feature to do all this in a much simpler way. It lets you code in one place, share sensor board data with many other Pixelblazes, and synchronizes the timebases.
Without Firestorm, if a Pixelblaze joins the AP network of another Pixelblaze, animation timebases will synchronize. It doesn’t switch patterns too, you’d have to load each Pixelblaze’s IP, but a timer could be used to make a multi-pattern pattern with synchronization.
For example, if you took one of the multi-mode examples, you can make it synchronize modes using time():
var minutesPer = 1 //run each pattern for a minute
var numModes = 5 //use up to 5 modes
mode = floor(time(numModes * minutesPer * .915) * numModes)