So what's really going on here? I have my opinion I'd like to share and see if anyone else agree's.
From what I can tell, people are upset that some boosters are significantly stronger than buffs. This is true, and I don't see anyone really arguing that point.
What I see are people arguing about the tolerance of them being used in a zone? This to me doesn't make sense at all.
I mean, you're all arguing about trivialities and not the source of the discrepancy. The point is that they're strong.
The other point is that they're expensive. I see a lot of people who are very wealthy in game just shrugging their shoulders and acting like it's not a big deal. That's not a fair vantage point. These wealthy people barely notice a scratch in their wallets when they buy boosters for such high rates.
I know pointing 'a finger' at the wealthy would just result in statements like "you're just mad cause you're not rich", and part of that statement is correct. I'm not rich, and I don't plan to waste my life trying to earn a wealth of pixels. That being said, I do work very hard for the few things I've managed to earn, so I'm doing pretty good for myself.
And I think that's what it should really take. You should have to work fairly hard to get them. But just saying 'fairly hard' is ambiguous. What I mean by it is that if you only log in to play for maybe 1-2 hours a day a few days a week, you probably shouldn't be able to afford using boosters regularly. But you should still be able to afford them.
So really it's just the two problems. They're expensive enough that only the wealthy can regularly use them, and they're so strong that it's causing an imbalance and griefing the gamers who encounter it. Be it in the Training Grounds, or the past areas, like Sikuku Ruins, and Desert of the Dead before that. And if you went back far enough, JCF + LCF suffered from it as well.
Really my point is, only 1 of the problem needs to be fixed in order to bring back a balance.
You can either take away the vast gap in power potential in boosters, or simply make them more affordable so that they're commonly available with some effort. Like Lisent U's are, if you catch my comparison correctly.
Sorry if that seems long, but this does seem to be a long standing problem and persist in appearing whenever mechanics are changed.