Another option to make up for the Speed Dial settings going away is to use the "Direct Dial" widget/shortcut. This puts a 1x1 widget on your screen with your contact's picture. When you first add the widget, it will prompt you to choose which phone number to call. Once it's added, just tap the widget to immediately open your default dialer app and call that person.
It's what I do, and it's built into the OS, so no third-party apps needed.