The most significant rule change is on stalling.
First call is a warning.
Second call is one point
Third call is one point.
fourth call is two points, plus choice of positions for your opponent.
Next call is a disqualification.
Hopefully this extra penalty at the fourth call will grab all of the wrestlers attention, and cut down on stalling. My fear is that it may cause officials to freeze up and not be willing to make that third stalling call. Time will tell.
There are also a couple of new uniform regulations.
Wrestlers may not wear wristbands, sweatbands or bicep bands during a match.
T-shirt with no sleeves may be worn under the one-piece singlet when approved by the referee.
There is no specification that the Head official approve the t-shirt, or that there be a medically necessary reason for wearing it. Just make sure to have it approved before you start a match.
There were also some changes that addressed the need for choice of position after a second injury timeout in the overtime periods. Just remember not to take a second injury time unless it is absolutely necessary.