They removed the individual Bluetooth and Wifi toggles in favor of the Power Control toggle bar. You can still download many different individual toggle widgets from Google Play. I prefer the free Power Controls widget, which is very customizable, takes very little memory, and oh by the way it's free.
Do you mean the stock Power Control widget or the 3rd party Power Controls widget on Google Play? You can't customize the former, but the latter is very customizable. Place the widget on your homescreen first, then go to the Apps drawer and select Power Controls to access the customization menu. Tap on the home-shaped icon in the upper left, and you can select which toggle bar to customize.