I disagree. There's a lot of evidence to say that the entire philosophy on the default balance level of 4e is different going forward.
Your disagreement is irrelevant. There is no evidence that the marked condition is going to be absent from 4E after essentials (considering marked is still described on the DM screen from essentials). The Knight uses different mechanics to make sure it has an alternative niche to the 4E fighter. In no way does this support the concept marks will be abandoned as a game concept.
Absolutely nothing else you wrote has anything to do with supporting the argument marks aren't going to be supported by future classes and monsters.