First, classic knee jerk response in this forum to criticisms of anything not Apple or iPhone related--unable to successfully defend something's deficiencies so lets try to pick apart flaws of the iPhone in response to deflect. 🙄 Where did I once mention the iPhone or Touch ID?
And second, your just simply incorrect in your latter comment. If you have to change the way you do something to accommodate functionality that cannot be done because of the hardware's implementation, then yes, it's a poor, inefficient design. When putting the fingerprint sensor in a different location on the phone allows it to be used without having to implement other workarounds, the yes, it's a poor, inefficient design. If it was on the front as Apple and Samsung do (or even the side like the Xperia Z5) I would not need to always pick it up or use a secondary unlock method when it's on a table or in a car dock. Security PIN, password, or front facing fingerprint sensor can always be used in these scenarios without implementing a secondary work around--this implementation cannot. That's the definition of inefficient.