in the grand old days of yore, you could kick or add to TF's but people got abusive and started to exploit the system so they changed it to a locked mode.
enemies do scale the fact than u can throw any group type in an AE mission at any level indicates that scaling foes isnt out of the realm of possibility
and finally there's already a fix that exists that allows you to never outlevel your contacts missions so oro wouldn't even be necessary anymore, whether they choose to implement it is another story