There have been several long threads discussing clarifications/changes to the Blitz rules. Since the list is quite long, I will summarize the less important ones here and the more important ones in another thread:
The sentence “To be rated, the time controls require from 5 to 10 minutes total playing time and have a minimum primary time control of 3 minutes.” is worded poorly. Better would be something like “To be rated, the time control must be between 5 and 10 minutes of total playing time and have base time of at least 3 minutes.”
Rule six starts off by saying “6.) Except for pressing the clock, neither player should touch the clock except:” and then it has 6a through 6e. You would expect these to all be situations where a player can touch the clock but they are not so rule 6 should be reformatted.
The TD Tip on insufficient losing chances states: “The TD should be aware that common practice has shown that in addition to the official Blitz rules that “Insufficient Losing Chances” claims are upheld only:”. Get rid of wording “that in addition to the official Blitz rules” which makes no sense.
Better yet: “Main time must be at least 3 minutes. And main time in minutes, plus increment or delay time in seconds, must be between 5 and 10 inclusive.”