Why? Can you give a couple of examples of battles?
It's obvious - reducing initiative or duration will only work well against a player, not against neutrals.
1) If the invisibility duration is shorter, you can kill fewer enemy units during the invisibility, so the breakthrough limit becomes stricter.
2) If the initiative is lower, various druids will definitely have time to thin out the hunters before they go invisible. Therefore, it will become more difficult again (sooner or later they will come out of invisibility, and it will be easier for the enemy to kill them after that)
3) A combined approach may be even more effective
4) A counter-argument to myself - there is the Battle Standard of Defense, which, in combination with such invisibility, will remain super effective. A counter-argument to the counter-argument - obviously, the Battle Standard of Defense is quite overpowered in itself, and the question is, what is the bigger problem, the invisibility or the Battle Standard of Defense?
Okay, guys, let's stop rehashing the same thing. We'll play the original version with invisibility for the hunters, if necessary. After all, this is a tournament mod, and it's being made by the tournament organizers. Maybe we're right, and then they'll fix it, most likely. Well, I think the tournament participants will get used to the changes.