Force touch is not really great for the wp ecosystem. At least not now. For a start:
- Software wise: There are other things that need to be dealt with. There are lots of improvements that can be made.
- Hardware wise: Including force touch in the OS level (and its main apps) would mean that every device (even low range) will have to have it. This would be really bad for low and mid range devices.
I would rather they focus their efforts hardware wise on things like better camera, wireless charging, pen support, windows helo... These features can be included in the high range devices and be left out of mid or low range.
Also, the force touch implementation is still in its infancy. They could come at it later when it is cheaper to manufacture and design a better interface when people give their feedback to apple iPhone. So far, the implementation does not impress me. For example, the context menu can be easily done by a long press but it is not generally done on phones. The peak feature is interesting. Time will tell.