Moto X no longer marked as ISIS ready? Whats going on?
Perhaps ISIS hasn't been updated to be compatible with Android 4.4 (KitKat)?
The best advice I can give you is that the Moto X is now running 4.4. With Kit Kat, you can use Google Wallet with tap to pay. It works, I use it on a regular basis. There is no need for ISIS with Google Wallet, as it is a much better app. Try it out!
I just checked the specs (vzw's website) on that phone, and it states that the moto x is isis ready.