[Solution] For Soft-bricked Devices - Verizon (PC/Mac)
This is a solution I found to work on my own GS4. The Verizon Update Utility seems to be able to restore a phone without any problems. However, if you are in a Soft-brick situation all of your data will most likely be erased (which is why we are told to backup so much). I looked all over the place for the Upgrade Assistant online since you can't access it from your phone if it's bricked, so I figured I could post it here and hopefully help someone out who has a bricked phone.
Install the Upgrade Assistant and SAMSUNG USB Drivers
Put your phone in Download mode
Connect to your computer (allow driver detect on Windows)
Open the Upgrade Assistant
Go to Repair Assistant
Wait: the Process should take anywhere from 30-90 minutes (because it downloads the Stock 1.6ish gb rom)
In the Zip file you will find:
The Verizon Upgrade Assistant (PC/MAC)
Samsung USB Drivers
These files come directly from the stock ROM on the GS4
Hope it helps!
EDIT: The Mac Software installs great, however the Windows software doesn't seem to be working for me. So if you can get it to work thats awesome!
Please note: this is not my software and is only the software of it's respective owner. I do not claim for it to be mine, I am only posting a link so as it can be used to help.