I rarely log into Author Central. I usually log into KDP for everything. I haven't logged into AC in a while, and I'm kind of reluctant to do so now.
Nevertheless, here we go...
*logs in*
Okay, it took it a few seconds to import my old account, but it did it without any hangups. I went to the sales page and all the books were there on a single page, like Simon said, so I like that. No more clicking through to other pages just to see ranks.
The market filter only had five options available. Seems weird. You'd think they'd either have just the U.S. store or they'd have all of them.
The rank numbers are BIG. Like they're designed for phones instead of computers. Inevitable, I guess--everything else has been heading that way--but I still don't like it.
Conclusion: I think I can live with it. I say that, though, as one who doesn't use AC much at all. If I ever actually
need it for something, I might have a very different opinion.