The DCI has essentially invited complaining and whining on an unprecedented scale now. Any restriction that isn't strictly necessary is one too many, IMO.
The DCI is finally listening to concerns of Vintage players after nearly a decade of neglect.
Except your own poll disproves this. The DCI is not listening to most players, and acceded, instead, to the wishes of a vocal minority.
But let's take your larger point at face value, that after years of what you call "neglect," the DCI should not only be more aggressive in management of the format, but should also embark on a more ambitious hunt for possible restrictions.
I would submit that such a project is inherently divisive and ultimately corrosive, even if there are upsides. Only a minority of players supported the restriction of Gush, and a tiny minority the restriction of Probe.
If the DCI undertakes further restrictions to placate a small minority, it will ultimately engender anger, resentment, and cynicism among the larger part, and ultimately damage the format, as many past restrictions have. Rich claims that the restriction of Brainstorm killed New England Vintage for a time. While I think that is an overstatement, it is undeniable that restrictions harm. Witness the anger after Lodestone Golem's restriction.
There is far too much complacency in calls for restriction. Too much ease and lack of circumspection in which they are demanded or proposed. The restriction of Gush and Probe will invite more unnecessary and harmful restrictions.
The restriction of Gush and Probe should be a wake up call, or a firebell in the night (you quoted one President, so I'm following suit ;p).
None of the predictions the DCI put forward have occurred or are likely to, and it should be nothing less than a total and abject embarrassment for the DCI. To have been so humiliatingly misled into a pair of restrictions that have had no empirically measurable effect whatsoever, let alone the effects they predicted, should garner nothing less than withering scorn. Pretty much every aspect of this B&R list change, from the predictions to the explanation to the hamfisted timing to clumsy setup in March to the overall mode and method of soliciting feedback has been mismanagement of the format of the highest order, and merits universal opprobrium.