sony sooner or later will understand that releasing a flagship every six months is just stupid. z2 had little changes over the z1 and z3 is... well.. exactly the same. it only makes sense updraging from a z to a z2,z3.
The bezels are to be expected. The Z2 flagship is already very thin. They have to keep the large camera sensor under the top bezel. They need engineering wizardry to minimize those top/bottom bezels (think Sharp Aquos Crystal)
Sorry what is the point in this? I don't understand this. If they are all the same anyway, we can go for the Z1. They are cheaper now.
its worth upgrading from xperia z and maybe z1 but surely not from z2.