i think using yourself as the metric for whether or not they failed (and your oriignal phrasing) is what is harsh. The game probably wont be something I want to play either, but I wouldnt label that automatic failure. Whether I like it or not, what matters is how well received it is.
If the stated aim is to support ALL playstyles, and provide OPTIONS which support that, regardless of your previous edition of choice (and this has been stated as the goal, unless they've changed their mind on that), and they then create a game that I don't want to play by choosing not to support a playstyle that a previous edition does support, then yes, they've failed to meet their stated aim. It's pretty simple.
It may be well-received, but still fail at their stated aim.
For the record, I'm not using myself exclusively as the metric by which the criteria for failure is judged, just an example, and the only one I can speak to. If they create a game that you don't want to play either, while there are previous editions that you do want to play, they have also failed.
Naturally I expect some outliers, and if they capture, say, the 95th, or even the 90th percentile - heck, given how fractured the community is - even the 80th percentile, they might not have failed completely, but to exclude those who like what 4e did for D&D is... foolish. And they will hit nowhere near even the 80th percentile with that in mind.
By adjust to facts dont he ground I mean they need to adapt to the feedback they get. They also need to adapt if their stated design goals create design issues. Design goals are important but you cant be a slave to them. You have to adjust as needed through playtest, feedback and observations at the table.
Have they done so? Have they changed the design goals? If so, I take back what I said. I don't think they have (officially) done so though.
I agree that they need to reconsider the implications of the design issues trying to please everyone will create. That's why right now we have a hodge-podge mess of a game that fails to please anyone but the group of people who will play the newest edition regardless.
I am not saying they should jettison 4E players. In my previous post I said they were neccessary. All I am saying is if they get more players than the prior edition that is a success in my book.
Granted, but success in your book, or my book, or financial success, doesn't mean they've met their goals of creating The One Edition To Bring Them All.