Watchface as a widget?

Idea.:

User can choose if app from watchface builder is watchface (default) or widget (not that usual, but usable).

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Possible advantages"

• There is a lot of interesting fields and options in watchfacebuilder (very nicetool!)
• But not everyone wants to see all of them all the time
• It also consumes significant battery (understandably, for really big number of fields on display)
• So one can have more plain watchface, and then something from watchfacebuilder as first widget
• In widget can be basically all fields of interest without worying about visiility or battery

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Would it be hard to implement?

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