I know this system, and it's excellent, but:
- ACTA is not designed with that in mind. You would have to work a lot to adapt Tank Leader activation system to ACTA. I wonder how it would be possible. How would you say that some ships are this or that formation? How would you say that this formation is good, bad, or whatever?
- It would kill the game. In TL, bad formations were usually stronger (more units) or you would have much more of them. In ACTA, if one side is better than the other, and have the same overall value, it would usually dominate the game. With an initiative bonus, and 2d6. Even a side with low initiative bonus could win it sometimes.
IMHO, if you want to fix it, don't do a major overhaul. At most, try what I proposed (the initiative winner can keep a ship, letting it move the last, even if the opposing fleet is more numerous). But care to fix something that's not broken.
Marc