Look at the Tag Team Finishers in Universe too! 3 of them have the Assisted Powerbomb as Tag Team Finisher by default (Gunther & partner [The European Bomb is already set as the default Tag Team Finisher of Vinci & Kaiser]), RK-Bro has Beast Bomb as Tag Team Finisher. Maximum Male Models has E&C's Tag Team move (Sidewalk Slam/Reverse DDT) as Tag Team Finisher.
The only way I have been able to make changes to a trio is by temporary adding a fourth member so to remove Gunther from the default tag team spot he is in you have to add an unassigned superstar (e.g. X-Pac) to the faction, then remove Gunther from position 1 1 and add Gunther to position 3 and move Vinci to position 1 then remove the unassigned superstar from the group. The downside of this workaround is it mess up the entrances and tag team finishers of the group. But what else can we do when in the games the leader of a group is in position 1 thus making them the default partner of a tag team in a group?