How do I change the speed of the app drawer appearing?
Things look and feel different as Ubuntu 17.10 comes with GNOME shell instead of Unity like before.
To change the app-drawer animation speed you may use a GNOME shell extension called "Impatience" from here. It provides the option to speed up/down GNOME shell animations.
Once installed and activated, reload the page and you'll see a settings icon. Click on it and you'll get a pop-up window which lets you change the animation speed.