Offensive gameplan
I basically agree with your premise. However, effectively taking away the Tight End as a pass catching option hurts the red zone offense. When you can not stretch the field, the windows the QB can throw through and get positive results get aweful small. Therefore it is better to have as many windows as possible. A good tight end also has the benefit of increasing his window size just with his size and strength, i.e. he can catch the ball in traffic.
Keep the blocking tight ends in until you get inside the twenty. Go to a big receiving corps in the red zone.