Among my concerns in the true DTB:
- Either only the characters at the TOP of the lineup can activate dualtechs, or characters at the bottom of the lineup will "stomp" the commands you already gave the people at the top of the lineup.
- If you take the "stomping" solution, then that issue becomes compounded if character #1 activates a dualtech involving character #2, the system properly skips #2's turn, and then character #3 activates a dualtech involving character #1. Does character #2 just do nothing that turn? The DTB is not designed to "rewind" without canceling everyone's turns, and it would probably be confusing to a player who doesn't realize what they did.
- Speaking of, if characters #1 and #3 have a dualtech lined up, you're on character #4's turn, and you press the "cancel" button, what does it do? Does it cancel the dualtech and give you character #3's commands? Back up to character #2's turn? Back up to character #1's turn? All make some level of sense.
A solution I've seen to that issue was someone making all dualtechs "instant actions" that put a paralysis effect on everyone involved with the tech, but this is NOT a one-size-fits-all solution.
The reason the YEP BSW alleviates these problems (well, there's still the first issue; I went with the "stomping" approach, since the plugin shows an icon for the skill each actor has assigned, meaning it will be less of a surprise) is that it lets you assign moves out-of-order. And my tweak is that assigning a move to character #4 (or whoever is last) doesn't automatically start the turn if anyone hasn't been assigned a move yet, which is how the BSW usually works (you can still start a turn early, though.)
I have no idea how Irina deals with this; I didn't look into Unison Attacks very much.