Last night I was bored, so I updated my Insider device to Build 10572. I got up this morning, set it up, and started playing with it. At first, I wasn't impressed. The Store was slow and crashed two or three times. The All Apps list completely froze twice in a row, requiring me to remove the battery from my phone and restarting. However, after the All Apps list actually worked, I started uninstalling the unnecessary AT&T gunk, and I realized just how fast the context menus are. Holding down on an app and hitting uninstall was incredibly fast. It actually uninstalled immediately instead of sitting there for five minutes until I have to hit uninstall on it...again. Then I realized that the Start Screen had been loading much faster than Build 10549. That apps were loading a little fast. That navigation made things phase out of existence less often. Tiles weren't flashing, apps weren't temporarily disappearing from the All Apps list, navigating to Task View didn't result in a second-long flash of black. It seems more complete than Build 10549, although it's still not perfect. Things still crash too much.
I'm enjoying this Build.
I'm enjoying this Build.