This is a little bit of that incredulity I mentioned.
De-fanging the VRA is not "slow forward movement", but back-sliding, making a lot of its protection unenforceable. Small forward-movement would be rewriting those coverage formulae to be Constitutionally enforceable, even in the eyes of this decidedly right-leaning Court.
On a related note, passing more restrictions on early- and remote-voting (options which tend to be used in much greater proportion by the working-poor—which is a group, in turn, that tends to include a greater proportion of ethnic minorities) is likewise a step back, not "slow forward movement". Same story with so many voter-identification laws. Opening up better and more efficient access to the ballot-box—that would constitute some forward movement, and needn't be reckless or impulsive.
Prohibitions against gerrymandering would constitute another potential "incremental" fix, with the convenient drawing in and out of racial groups not necessarily back-sliding, but certainly a side-stepping.
And, of course, the what he said with cajun's responses. Generally ending private-prisons, too, would hardly be a reckless step, and would certainly help gradually improve the lot of our nation's marginalized.
So yea: incrementalism can still be argued for. But you can't argue there hasn't been any back-sliding. And, while incrementalism and gradualism are, indeed, "by nature forward moving", it's a lot more dubious to claim conservatism is "by nature forward moving"—unless you just mean it is in that way in which all things, by Nature, move forward.