If you want animated GIF functionality then you need to to use the new app. The whole point is that Windows 10 CAN work like Windows 8.1/7 (if that's what you want). You have the choice between Windows 10 (have to hold down a key to zoom) or Windows 8/7 (have to hit arrows to change images). If you don't like either method, then find an app that does what you want and promote it until it becomes mainstream! Microsoft is not limiting the apps you choose, they're just concentrating their efforts into functionality that average users actually want.