@tpr No reason to study the lines deeply. It's just about playing comfortable positions, and the opponent at this level doesn't know theory well as well. The "real chess" start not in the point where the humanity doesn't know how to play yet, but where the players don't.
I think various sharp lines are more appropriate to learn "tactics training, calculation and pattern recognition" as you mention, and to be honest, Brooklyn doesn't look sharp enough and can lead to a slow game like in Petrosyan example you linked to. And to play such a game properly you should have better studied and practiced French Advance before. Despite I'm completely okay with Brooklyn in general, I doubt it is a good way to go for an aspiring player, and 1... e5 followed by something less common than 2... Nc6 would be my recommendation for sure.
@nh78 If you think that a couple of engine/theory lines with a phrase "clear advantage" (supported by what? engine evaluation?) refute the opening, I don't want to discuss that anymore. You can as well "refute" the whole Alekhine Defence in the same manner, but oops, the Brooklyn will not be in the main line, and thus you'll need to make up a refutation over the board when you encounter it.
I think various sharp lines are more appropriate to learn "tactics training, calculation and pattern recognition" as you mention, and to be honest, Brooklyn doesn't look sharp enough and can lead to a slow game like in Petrosyan example you linked to. And to play such a game properly you should have better studied and practiced French Advance before. Despite I'm completely okay with Brooklyn in general, I doubt it is a good way to go for an aspiring player, and 1... e5 followed by something less common than 2... Nc6 would be my recommendation for sure.
@nh78 If you think that a couple of engine/theory lines with a phrase "clear advantage" (supported by what? engine evaluation?) refute the opening, I don't want to discuss that anymore. You can as well "refute" the whole Alekhine Defence in the same manner, but oops, the Brooklyn will not be in the main line, and thus you'll need to make up a refutation over the board when you encounter it.