They could make the screen a bit bigger (with the phone itself having very similar dimensions), replace the HTC logo and buttons with a fingerprint sensor, include a 20-megapixel camera (but with good optics, unlike the M9's), the Snapdragon 820, and removable batteries/SD cards.
The M7 created buzz for HTC when they really needed it and they've yet to match that. Perhaps this (http://www.engadget.com/2014/04/18/htc-optical-zoom-2015/) could help?
The M7 created buzz for HTC when they really needed it and they've yet to match that. Perhaps this (http://www.engadget.com/2014/04/18/htc-optical-zoom-2015/) could help?