I'm not ready to believe that his U-turns are serious and permanent until they become serious and permanent. One of the things I didn't like about him was how flip-floppy he's always been about, well, pretty much anything (and then denying this after the fact). Supporters could then find him saying whatever they want to hear, because on so many things he would give all possible opinions anyway, so of course one of them matched what his fans agreed with. In one sense that's still true, then. Maybe his U-turns are what *I* want to hear, and tomorrow he'll reverse again.
I'm cautiously optimistic that, perhaps, he'll start to recognise that his bombastic simple message from before just won't work. In one sense that doesn't matter, though -- what matters is what his fans think in response. It seems that a few are of the opinion that he's been corrupted by the system, or some such -- rather than that their entire approach to solving whatever problems they think the US and world face is broken from the start. I'd like to see a few Trumpistas go on the same journey Trump appears to be going on, anyway, rather than treating him as a lost sheep.