in the months of March - June I did nonstop levelling of new 50s. Nearly all with the same method. PL to 20-30, then run DFB (badges) and all the TF/SF/Trials Red/Blue in level order (top level of the TF/SF/Trial as reference) to me this was very fast, and I could get a new 50 after about two days.
This method would be a disservice to anyone learning the game. (it would be nearly as fast without the PL bump to 20, but for slotting convenience I always tend to do it that way) To test a new AT and power sets it is great for an experienced player. But a new player might quickly get lost in TF mechanics and over whelmed by choices in combat and character development. They will level fast and might be great 80-90% time and then the "city hall fight" in Posi 1 hits and they are screwed. Or the "get through the dam" in Posi 2. And on, and on.
We cannot (and should not) dictate how players learn the game. There are plenty of players in game and on the boards who will answer all the questions people have. No one can make a person reach out, and it is hard to even teach people they might want to ask if that is not their comfort zone.
CoH, like life, can be a very organic learning process. That might be a rave review or a giant critique.