Pricing pressure on the B737NG

Boeing for the first time acknowledged pricing pressure for the B737NG yesterday, when Ray Conner, CEO of Boeing Commercial Airplanes spoke at the JP Morgan Aerospace Conference. A synopsis can be found here at Leeham News and Comment. Read also the comment to get an insight of what readers think about how Boeing handles the battery problem of the B787.
Conner also said that there was (and is, I suppose) pricing pressure on the B737MAX, but this is normal for new aircraft entering the market.
Where the pricing pressure comes from gets clear when we look at the number of open orders and the orders Boeing has to fill until the B737MAX enters service in late 2017 and until the B737MAX