is it me, or are these phones getting too damn big? the Z3 is the size of a NOTE 3! come on Sony, that's nuts. do what you want with the Ultra for a phablet, but please, keep your phones at a reasonable size. the Z2/GS5/M8 are already a bit beyond what i think is "too big" (perfect size would probably be a GS4).
why not:
1. make the bezels and top and bottom smaller -- instead of bigger!
2. increase earpiece/speaker volume from the Z2
3. put a next-gen CPU/GPU combo in it, but maintain standard HD resolution. (forget about pointlessly chasing 2K pixels on a bloody handset like dumb LG/Samsung are trying to do)
4. use Gorilla Glass 3 (or 4, if that exists by the time of release)
5. optimize the camera software/hardware so that 20MB photography isn't only manual
6. increase brightness of the screen for outdoor viewing
7. make 64GB and worldwide LTE bands standard issue
this would be perfect.