A major problem is that coaches are now getting confused (yes I know) But in their world a peel back block is any block directed back toward the teams goal line. Either high or low. The same for a crack back block. Any block back toward the "center of the field", once again, high or low. We are now using these terms as illegal blocks, when they are only illegal in certain situations. This is how coaches are viewing this and are now more confused than they were.
I have had several coaching "friends" ask if they can't crack anymore? I explain the rule, low block before the ball crosses the NZ, etc, and they just say, Oh, like it use to be? But they are hearing that peels and cracks are illegal blocks. I foresee a big learning curve for the new definitions of words that are being used. Just my opinion, this and $3.50 will get you a cup of coffee at your local DQ.