the article/post say DRK is just a copy of Bitcoin CoinJoin (eg: Bitcoin's Dark Wallet), so, this is where the idea and the name Dark coming from? I guessed so.
Basically DRK/darksend is just a copy of Dark Wallet and this is why the coder can't seem to fix any DRK problem. CoinJoin is still an experiment! This answer my question to why DRK instamined too much/half of their coins.
No, you're wrong on all your points. And I counted 6 of them.
Technically you are right....but Darkcoin does implement coinjoin (and so does the dark wallet). Evan Duffelid took that idea and implemented it, along with some other things into the Darkcoin protocol. Darkcoin attempts to decentralise the process via Masternodes
Though I'm happy to be corrected here.