[Xperia Z3 Compact General] Vic.:
If this is of any help, I have tried rooting my Xperia Z2 on 4.4.4 with the above method and this is the log:

--- Xperia rootkit 2014/07/19 ---

waiting for device...
4356 KB/s (21784 bytes in 0.004s)
5701 KB/s (125420 bytes in 0.021s)
4458 KB/s (2336291 bytes in 0.511s)
6988 KB/s (1048328 bytes in 0.146s)
148 KB/s (148 bytes in 0.000s)
18 KB/s (55 bytes in 0.002s)
628 KB/s (629 bytes in 0.000s)
5173 KB/s (25863 bytes in 0.004s)
1359 KB/s (13592 bytes in 0.009s)
30 KB/s (60 bytes in 0.001s)
2159 KB/s (4318 bytes in 0.001s)

getroot start.
running with pid 1018
i have a client like hookers.
starting the dangerous things.
0xf1c00000 is a good number.
cpid1 resumed.
0xf1c03dcc is also a good number.
0xf1c16000 is a good number.
cpid1 resumed.
0xf1c19dcc is also a good number.
0xf1c52000 is a good number.
cpid1 resumed.
0xf1c55dcc is also a good number.
0xf1c68000 is a good number.
cpid1 resumed.
0xf1c6bdcc is also a good number.
0xf1c7e000 is a good number.
cpid1 resumed.
0xf1109dcc is also a good number.
0xf111c000 is a good number.
cpid1 resumed.
0xf111fdcc is also a good number.
0xf1136000 is a good number.
cpid1 resumed.
0xf1141dcc is also a good number.
0xf1174000 is a good number.
cpid1 resumed.
0xf1177dcc is also a good number.
cpid3 resumed.
hack.

module crc=ff791c4f
module crc copied.
insmod: init_module '/data/local/tmp/ric_disabler_mod.ko' failed (Exec format er
ror)
rictype=3
mount: Operation not permitted
/system/xbin/su: cannot open for write: Read-only file system
Unable to open /system/xbin/su: No such file or directory
Unable to open /system/xbin/su: No such file or directory
link failed Read-only file system
/system/xbin/daemonsu: cannot open for write: Read-only file system
Unable to open /system/xbin/daemonsu: No such file or directory
Unable to open /system/xbin/daemonsu: No such file or directory
/system/app/SuperSU.apk: cannot open for write: Read-only file system
Unable to open /system/app/SuperSU.apk: No such file or directory
Unable to open /system/app/SuperSU.apk: No such file or directory
/system/xbin/busybox: cannot open for write: Read-only file system
Unable to open /system/xbin/busybox: No such file or directory
Unable to open /system/xbin/busybox: No such file or directory
/data/local/tmp/install_tool.sh[92]: /system/xbin/busybox: not found
mkdir failed for /system/etc/init.d, Read-only file system
Unable to open /system/etc/init.d: No such file or directory
Unable to open /system/etc/init.d: No such file or directory
/data/local/tmp/install_tool.sh[112]: can't create /system/etc/init.qcom.post_bo
ot.sh: Read-only file system
/system/etc/init.d/99SuperSUDaemon: cannot open for write: No such file or direc
tory
Unable to open /system/etc/init.d/99SuperSUDaemon: No such file or directory
Unable to open /system/etc/init.d/99SuperSUDaemon: No such file or directory
/system/etc/install-recovery.sh: cannot open for write: Read-only file system
Unable to open /system/etc/install-recovery.sh: No such file or directory
Unable to open /system/etc/install-recovery.sh: No such file or directory
link failed Read-only file system
/data/local/tmp/install_tool.sh[124]: can't create /system/etc/.installed_su_dae
mon: Read-only file system
Unable to open /system/etc/.installed_su_daemon: No such file or directory
Unable to open /system/etc/.installed_su_daemon: No such file or directory
/system/xbin/ric_disabler_mod.ko: cannot open for write: Read-only file system
Unable to open /system/xbin/ric_disabler_mod.ko: No such file or directory
Unable to open /system/xbin/ric_disabler_mod.ko: No such file or directory
/data/local/tmp/install_tool.sh[148]: can't create /system/etc/init.d/00stop_ric
: No such file or directory
/data/local/tmp/install_tool.sh[148]: can't create /system/etc/init.d/00stop_ric
: No such file or directory
/data/local/tmp/install_tool.sh[148]: can't create /system/etc/init.d/00stop_ric
: No such file or directory
Unable to open /system/etc/init.d/00stop_ric: No such file or directory
Unable to open /system/etc/init.d/00stop_ric: No such file or directory

After flashing 4.4.4 again, I get a "System UIDs inconsistent" warning and no root. My phone is also freezing every 3 minutes now.