Bytecoin has issues regarding scaling. Evan has thought of a workaround to attain ring-sig level anonymity without the drawbacks of ring-sigs. If it works = epic win. We'll see how it goes.
In the meantime Bytecoin must improve its own implementation because as it currently stands, it has issues in scaling and security (it's crackable by quantum computers). Whether this can be fixed in the current implementation or a scratching-off of the current implementation and relaunching as a new coin, will be the real question. If it's the later, all the bytecoin 1.0 + clone coins will be irrelevant. And clones of the bytecoin 2.0 variant will be unsuccessful given the history of what happened to clones of 1.0.
Really? Quantum Computers? That is an argument...if they come out we have far worse problems. Tell me how Darkcoin is quantum computer secured? I may point to this: https://en.bitcoin.it/wiki/Myths#Quantum_computers_would_break_Bitcoin.27s_security
Also tell me how the masternode stuff will not have scaling issues?