IMO the core issue with PSO2's gameplay loop has been Urgent Quest / Emergency Quests in Japan, and I hope this changes in NGS. Let me explain why I believe this is an issue, especially in PSO2's current state in NA and even in the past in Japan:
PSO2 relies too heavily on scheduled UQs / EQs, the main big raids of the game that net you the loot you really want. This is exactly the issue with the game in my opinion. With nothing else meaningful to grind for (Ultimate in NA especially getting tiring) there is not much incentive to play the game outside of these scheduled times, with the exception of an unscheduled, but if you've played the last two weeks you'd know that the amount of unscheduled UQs have been pitiful to say the least. Similarly, you could come home from work or school and hop on for some PSO2 only for nothing to actually occur in the little bit of free time you have.
That's why I hope NGS changes this, to make content more meaningful no matter what time you play. Because in reality, the gameplay loop for most in PSO2 devolves into "sitting in lobby until next EQ". This has been the case even in Japan often enough.
It's way too late to change the core loop of PSO2 right now, but if I were to change it I'd make UQs / EQs accessible all times of the day, with restrictions, either X amount times per day or less drop rate over scheduled UQ / EQs. Or to make it so that older EQs rotate in for free to play whenever. That way people can enjoy the content that they want to go for and farm what they need. The only way this would work however is if old content doesn't become irrelevant, so all UQs become useful in some way to anyone.
I hope NGS changes how this core gameplay loop works, because I'd like to log into the game knowing I'm doing something useful with my time. Right now, I don't think that's the case and it hasn't been in PSO2 Japan for a long time as well (it has since changed a bit with more Limited Quests and Divide Quest, but even then old content is still irrelevant).
When 99% of the best items in the game drop from UQs / EQs that only occur at specific times, some of which you may never be able to attend due to circumstances outside your control (work, school), it can be frustrating going into a game knowing that there's nothing to really do or work for.
Again, I know this changes a bit in Japan but even still I don't think it's enough to carry the game. I hope NGS makes some serious changes. That's all. I hope to hear your respectful opinions.
Yes I understand Triggers exist, however I don't think it's enough to to carry daily play sessions.