Seems to me easiest fix here is password generated by the host. Without it you can't join.
HT might at least look at being able to do that if you asked him REAL nice and sent a case of Scotch.
Makeing H2H 16 player would be cutting his own throat IMO.
For squad practise, intersquad duels etc go to the dueling Arena, thats what its THERE for.
As for the TA, I'd prefer to keep that for working with the new guys who have lots of questions and need help.