If I remember right the rules were set in place for the summoning before we had even started actually Rping the mastering of the beast, if developing a relationship with the beast is key to mastering it through rp, then controlling the beast as a summon could also fall into the lines of relationship.
If I recall the rules have never finalized on what actual Genjutsu would be used to control them, as the only one ever seen was Sharingan, and not everyone is an Uchiha anymore.
I think that utilizing the beast a summon is the pinnacle of a friendship with the beast, Why would the beast forever hate you when you have given it freedom in the real world in exchange for help in combat? If you ask me the biju would prefer it to being trapped away in a cage inside of their host.
Plus, what if the Jinch is an Edo like myself or Trev and can not host the beast? If the beast has had relations with the individual in the past it wouldn't just develop an unbiased hate for the jinchuriki if they've interacted before,
I'm willing to take the role of maintaining a previous and current jinch list in the biju arena for the sake of documentation for all of this, if we put it in place