That wall had been hit numerous times in the JP version of the game, it's in more of a decline now as we see it here. Yeah, it's noticeable when you see the same set of people regularly and the same set of people selling their wares at inflated prices as well. Will this content keep people around? The way I see it, if you had little to no interest before, it won't change that opinion for those people. It'll only continue to interest us that play it for what it is, a mess of systems that try to get into everything, without fully making the game with a specific audience in mind. As it is now, it's either playing with virtual dolls and dress up, a hack 'n' slash or a way for experienced players to flex their knowledge or skill.
Look at a game like Warframe, it had done well for a while until it hit content draught, since it focuses more on the systems it had in place. PSO2 is not as focused as that or other games that retain a high retention rate for steam stats. Couple that with the dated look and design of the systems, it's going to be difficult to bring in players for base PSO2.
It's just a matter of what kind of philosophy Sega has going forward as the global release of the game felt more like an attempt to make some revenue needed to get NGS on track. The better question would be how Sega handles NGS going forward with the many ups and downs PSO2 had across the versions of the game they had released.
This is why I'm biding my time for NGS, and I've seen countless posts complaining about people who are waiting for NGS lol, simply because I see the expansion as a clean slate and the potential for Sega to fix what went wrong with PSo2, I'm hoping for a good experience, I just hope global survives long enough to see it.