I've come up with a solution for the sword idea with trunks. Tell me what you guys think.
If melee is selected, when you turn on *Turbo* Trunks automaticly pulls out his sword after 2 seconds.( This prevents the animation from being interupted and prevents the sword from being *brutaly* abused)
If the sword Pull-out animation is Interupted by someone else attacking...
Then trunks will not try to pull it out again unless turbo is turned off then back on.
Trunks can also pull out the sword while running,falling,swooping, ect..
The Advantage of using the sword is that you do more damage, but like gon said you should only be able to basic melee 1 time not twice. Thus, saving ki because you dont have to chase for the 2nd hit.
The amount of damage the sword should do, should be 3/4 of what the damage of the 2 hit basic melee combo damage.