Actually you can easily flash stock 4.4.2.
Download stock 4.4.2 rom you want to flash. Download any stock 4.4.4 rom and take gpt.bin from it.
Replace 4.4.2 gpt.bin with 4.4.4.
Than you can downgrade your phone
There is somebody have already uploaded gpt.bin from 4.4.4. You should search for it.
motoboot.img and boot.img are also throwing deprecated tz error, you should also replace it from verizon's 4.4.4 or just leave them as they are if you were already on 4.4.4.