If you really want to help others improve their magic, then take a class in giving feedback. Once you start getting trained in giving feedback, you will understand why a laundry list of criticism isn't usually the best approach.
Okay here is why I do not buy into giving them only a couple of things wrong. Lets go back to Johnny Youtube who lifted the Daryl ACR.
Like before he post his video and ask what is wrong. Of the twenty-two items in the effects twenty were bad.
My way, "Okay you did 1-20 wrong. You nailed the ended and you didn't do play by play patter. Fix those twenty things." This way they get everything up front.
Your way.
"The patter was nice and great ending. You need to work on A and B."
Now they think all that is wrong and moves A and B. They spend the next couple of week fixing those two moves but spend more time doing the other eighteen thing wrong. It is becoming more habit and muscle memory of doing those things wrong. They come back and you say "Hey nice job on A and B but C and D were bad." He is thinking why are they bad now but not three weeks ago. So off he goes to fix those two things and spend two or three weeks doing sixteen things wrong in his practice. Making them more into bad habits and muscle memory. Comes back and gets told two more things and the cycle repeat for months.
To me it seems like he would be more discouraged and down hearten by being told week after week after week that he is doing things wrong and each time it takes longer because the new things he needs to fix takes more time, because he thought he was doing them right so he kept doing them.
Being a good magician does not automatically make you a good teacher.
Who is the better teacher, someone who has 95% successful students, but no elite students or someone who has a 5% success rate, but all are elite students in the field?
I would want to learn from someone who is the best at what they do. Someone who attracts those who are driven to be the best. A high attrition rate in something like learning a performance art skill can be a good thing. It weeds out those who just want to do a few things from time to time for people and those who want to be at the top of the field. Why seek out someone who just pumps out cookie cutter people and not try to become one of the elites? I mean someone who wants to be the next SRV is going to try to learn from Buddy Guy and Clapton. Someone who just wants to play on the first five frets around the camp fire is fine with a guy who has a 95% graduation rate. You have to know what you want and finding the person who is going to get you there.
Now on to the weekly failure ..........
I personally find magic effects very difficult to "review or rate". There are moves which I could never pull off, but for others it may be their easiest slight. So an effect which may not work for me, may work for someone else. I would also say that presentation plays a big role. Maybe an effect is great for me, but may bomb for others because they do not have any ideas on how to present the effect. How many people do you know that have ranted and raved about a book, but do not preform any effects from the book?
For me a good review tells you the facts .... ie. the gimmick is 2" x 4" and is battery operated. There are 10 impromptu card effects and 10 gaffed card effects on the CD. Most of the effects require a stack.....etc.
For the most part the weekly failure has a lot of emotion. I would rather not burn bridges, magic is a small community, and if you are successful you will probably meet these people in your future. Would you say the same thing to their face? While I do admit to laughing about it a few times, I just can't help but feeling like the author is a bitter person. I sure hope he doesn't ever need help from the people he trashed. Lets face it he often takes personal attacks on people. While other may forgive a hard review, they will usually remember a personal insult.
Again, he seems to be making a fine living with his magic so it't not a bitterness towards other workers. If you can get into his super secrete magic blog (invite only), where he shows his work, you see his skill and his passion and his love of magic. You understand why he does what he does. He is fed up with the cheese and the youtube videos of the kids exposing magic and making videos where their junk is front and center. He points out bullies and scamers. He talks about how there seems to be a level of acceptance among magicians about how poorly some treat their birds. He covers many of the things that happens in magic that no one really wants to talk about.
Also, as William said, he does change his stance from time to time. His made William a WFM and then later had a change of heart. He has sung the praises of Harry Lorayne but at the same time talked about how he is now hurting his image with his tantrums on the green monster.