doctorbadwolf
Heretic of The Seventh Circle
In my current long-term campaign, I have three of five players who have everything written down/printed out/or spell cards of every spell or ability they have. Darndest thing as I didn't say anything about doing that. Surprised me as at the AL tables I DM I find players all the time like you mention who don't print or write down anything.
The monk doesn't have his abilities written down but he has so few he can memorize them. Ironically, the elven ranger has none of his spells or abilities written down and he's the oldest player and a Warrant Officer in the Army!
That's people for ya!
Is it? Not IME. nearly everyone I saw with an interest in playing found out about ddi and used that, or started out just using the phb unless a player came to the table with a different book. Since new ppl have no expectation of official supplemental material being wildly imbalanced, I saw little (if any) conflict over such material, and again, DMs felt no need to read through whatever book it was, unless an older edition player told them they should.Oh, I don't particularly disagree [MENTION=6704184]doctorbadwolf[/MENTION].
Thing is, that's where the pipeline was closed. Most DM's learn from other DM's, rather than starting cold. When you lose 2/3rds of your DM's, that pipeline gets a lot smaller. And, couple this with a system that is not particularly inviting - walls of text, text that is written in a very specific voice, and, again, a MOUNTAIN of supplementary material, the odds of new DM's coming in gets smaller and smaller.
Think about it, by the end of the first year of 4e, we had the core 3 plus, what, ten more supplements? Plus Dragon magazine material. Plus whatever else. There are entire game lines that have less material than that. Never minding that we had double that by the end of the second year. That's incredibly intimidating to someone who is new to the hobby.
For the DDi groups, there just wasn't any pushback at all at the number of options, except from some players. 4e DMs, again, seem to mostly not even take any notice of the number of player options, because why would they?
Everything you list/describe, so far as I can tell, are things that intimidate or put off groups or players, not DMs. (Or are things that are entirely beside the point, because they were never contested in the first place, like the format of the books).