It has MMS Compression disabled along with color icon (like a mini version of the actual app's icon) for the notification icon, rather than the default flat one.
You'll need to install this manually, overwriting the current Message+PRIME.apk located in /system/app/ (or optionally renaming the current one with a .bak after the ".apk" and then just pasting the modified one from this post) and make sure permissions are correct. Then, Reboot.
Definitely not a bad idea to wipe cache and davlik, either.
I may make a flashable zip at some point, just thought I'd share this as-is for anyone interested.
Thanks to chingy51o for permission to drop this, and team Mik for a great ROM and the changes for this apk in particular.
Link to CODIS thread
screenshot of the icon in the status bar: