If you want you can do this, I'm trying it right now. It uses a cm11 base with some ports from the Xperia Arc thread

Install this KK ROM from raymanfx:
http://forum.xda-developers.com/show....php?t=2555243

Then apply the systemui from this thread:
http://forum.xda-developers.com/show....php?t=2674326

The home/launcher: http://forum.xda-developers.com/show....php?t=2589775

Clock + Calendar + Album + PhotoEditor + Sketch:
http://forum.xda-developers.com/show...php?p=49179138

Walkman (also visualizer in that thread:
http://forum.xda-developers.com/show....php?t=2730431

Walkman music widget:
https://play.google.com/store/apps/d...he.musicwidget

And xperia keyboard:
http://forum.xda-developers.com/show....php?t=2588353

I have no idea how well everything works together, but for now it works.
You can probably also find the other z2 apps if you want (sony movie etc.) but this was all i needed.

EDIT:
Also take a look at this: http://forum.xda-developers.com/show...2795340&page=2