Worry not, i have found a solution for your problem. This method only let's you use custom ROMs (sadly), but it's meant to be a temporal solution while we wait for a 4.4.4 GPE image anyways.
So, without further ado, here's my fix:
You will need:
-The good ol' Android SDK
-A custom recovery. I recommend TWRP, since is the only one i have tested.
Official TWRP Images for Moto G: http://techerrata.com/file/twrp2/xt1...1.1-xt1032.img
-The gpt.bin from 4.4.4 (this is the partition table)
I extracted it from the OTA file and uploaded to my Dropbox: https://dl.dropboxusercontent.com/u/82658555/gpt.bin
-A custom ROM of your choice (obligatory) + GApps (optional)
What to do:
Once you have the Android SDK, decompress the folder sdk/platform-tools in a place of your choice.
Inside this folder, put gpt.bin, the custom recovery image and the ROM and GApps zip's.
Start your phone on fastboot. Connect it.
Inside your decompressed platform-tools folder, hold shift and right click inside the folder. Select "Open command window here".
Make sure your phone is properly connected by typing "fastboot devices" (without the quotation marks). The command prompt should show your phone serial number.
Now we start the real deal. Fist of all, flash gpt.bin using this command:
fastboot flash partition gpt.bin
Make sure it ends on "OKAY"
Now, flash the recovery
fastboot flash recovery nameoftherecoveryfile.img
Once this is done, enter recovery using the fastboot menu on your phone (use Vol- to highlight "Recovery", and then press Vol+)
Now your phone should boot on recovery mode. If you recieve an error like "Can't mount /system/", don't worry, this is normal (there's no system partiton yet, after all). Now you can use ADB command with your PC. Once again, to be sure everything is connected properly,tyipe on the console:
Once that is done, it's time to give your phone the custom ROM, so you can flash it. Type (or copy/paste)
adb push NameoftheROMfile.zip /sdcard/ NameoftheROMfile.zip
If you have GApps, do the same for those
adb push GApps.zip /sdcard/ GApps.zip
Now you can finally disconnect your phone from the PC! You are almost done, select "Install" in your recovery, and flash your ROM zip, then the GApps if you have them.
Once it's done, you can reboot to system.
And you will have a working Moto G again!!
Enjoy it, and don't brick it again