honestly I had the same question a few days ago and I went ahead and simply had my bootloader unlocked by that Chinese guy.
I'd rather have the peace of mind knowing anything is absolutely stable system wise when switching to 4.4.2 instead of "maybe" everything working alright.
This way too, if going forward android is updated again, it will be easy to side-load or even take an OTA; versus safestrap and/or 4.2.2 root method may not work at all or cause more issues in the future.
I guess what i'm getting at is, the unlocked bootloader will guarantee the longevity of my moto X
my 2 cents