I don't understand why that complaint comes up so often. Based on what we know of the ideas, and the sample art shown, yes, the ideas presently mostly seem like they would work just fine if a creative team was behind them full time.
[hide]Its a comic about comics, it assumes you know at lest some about the history and what they're being based on. (As stateside readers, we lose out on this somewhat). Crow is present as basically Dragonball or One Piece, Tanto is like Dorremon which has been running for decades, and PCP could easily be Boy Detective Conan (which has been running for forever) and Panty Flash fight is like countless other similar series. Buisness Boy Kenichi can be fun and popular as Phoenix Wright has taught us, crazy mtorcycle anime is like a handful of other driving inspired series, and Reversi, while being a blatant Death Note clone… well, its from the creators of Death Note, and that was absolutely successful, but not mainstream. And all of Aoki's shoujo manga... fail to be number 1 in a shonen magazine.
They aren't going to put their entire all into developing these stories,because... they aren't telling them. They're doing the story of Bakuman. A page here or there to showcase an artstyle, and the characters talking about why it's good, is all you really need.
They're all ideas borrowing from established successes... because they aren't the story in and of themselves.
I can talk about Hajime No Ippo even though I've only read a few chapters out of 900, or I can discuss Here is Greenwood based on a tiny sample and seeing its artwork, or I can go on at length about Initial D or GTO... despite only knowing a little bit about any of those real series. I can tell you vaugley about Yugioh's spin offs despite having only seen original Yugioh, and probably give you a pretty acurate version of an average episode plot. (Hint, it involves children's card games and the hero having less life points until the final turn and a lucky card at the end.)
Just looking at the art, and getting a synopsis, or sampling a small bit of any of them, or just knowing the genre in general, I can glean a lot of information about those real, existing series, and know if they're for me or not. I can also understand what other people would like about them, or decided I might want to give them more of a shot if enough people are enthusiastic about it. If Hattori says "this is good because it has all these characteristics", I take it with the same credibility that would come if Greg told me the same thing about some movie or another.[/hide]
its the same with all the imaginary series we get samples of in Bakuman. I've read more of Crow than I have of Toriko or Skip Beat, and I have a better idea of what its about than those real, existing series.
We see enough of the fake series to know what they are.