The difference here, I think, is that this is being presented as policy. Barack having a beer and Dutch chopping wood weren't. I completely agree this immigration stay is fairly insignificant policy-wise but I suggest it has real weight as a culture war weapon, which I think is its intent.
On it being Bannon's rather than Trump's: a difference between Obama and the current president is that he was someone who actually cared about, thought about, articulated, promoted policies. Whether you agreed with them or not, they were his. Not even Trump's strongest supporters say he is engaged in that way. He's just not a policy guy. Nor does he have to be. Other presidents, W, for example, were similar in that respect and that turned out - oh, wait, it didn't turn out very well, did it? Reagan would be a better example. Come to think of it, donkey presidents tend to be wonks, don't they. I guess Democrats are naturally technocratic.