I tried flashing with the RSA Motorola tool and the MotoFlashPro, but neither worked with the US firmware. I haven't tried anything else yet, since I'm scared I'm going to mess something up. But if you would like to try, you could try rooting and patching some of the files, or try flashing the RETAIL firmware, although it's designed for xt2301-4 and not xt2301-1.
Flashing the RETAIL firmware may work since others have been able to convert from other regions as well. But as
@gibberishman mentioned the hardware is slightly different and there have been reports of nfc not working, etc.
I downloaded the RETAIL firmware and attempted to 'spoof' the Boost software by removing the MD5 checks in the flash script but no luck. Half the items didn't flash due to protected partitions so unless I have an unlocked bootloader, it doesn't flash. What's odd is these are legitimate firmware files straight from Motorola. I'm guessing there is a different signature for these from the standard unlocked variant vs Boost/Dish.
echo off
fastboot getvar max-sparse-size
fastboot oem fb_mode_set
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash vbmeta vbmeta.img
fastboot flash vbmeta_system vbmeta_system.img
fastboot flash radio radio.img
fastboot flash bluetooth BTFM.bin
fastboot flash dsp dspso.bin
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash init_boot init_boot.img
fastboot flash vendor_boot vendor_boot.img
fastboot flash dtbo dtbo.img
fastboot flash recovery recovery.img
fastboot flash super super.img_sparsechunk.0
fastboot flash super super.img_sparsechunk.1
fastboot flash super super.img_sparsechunk.2
fastboot flash super super.img_sparsechunk.3
fastboot flash super super.img_sparsechunk.4
fastboot flash super super.img_sparsechunk.5
fastboot flash super super.img_sparsechunk.6
fastboot flash super super.img_sparsechunk.7
fastboot flash super super.img_sparsechunk.8
fastboot flash super super.img_sparsechunk.9
fastboot flash super super.img_sparsechunk.10
fastboot flash super super.img_sparsechunk.11
fastboot erase apdp
fastboot erase apdpb
fastboot erase carrier
fastboot erase ddr
fastboot oem fb_mode_clear
pause
fastboot reboot
exit
EDIT: Flashing the RETAIL on locked BL caused my device to soft-brick, I had to restore via Motorola Rescue and Smart assistance software which worked like a charm. If open BL, you may be able to change the software/carrier channel then attempt to restore through Motorola tool although YMMV.