Waddup its ya boi with few suggestions.
1. Trivia Point Store
Upgrade the Trivia point store, downgrade the point amounts for stuff like mboxes etc and add more stuff.
Would love to see some cosmetics there, maybe add some new ones that are only available thru the trivia store?
Trivia outfit / cape with a question mark on it or something cool like that.
2. Wilderness Keys
I guess this is already out there pointed out, but yeah. It really does need a fix considering how rare they are to get.
Add more levels to dungeoneering. Possibly something that you have to do in a group and by that also add some rewards. Would be fun group activity.
4. Donator Islands
Ultimate & Premium ones. Well Ultimate doesnt exist, it could be just a chill zone of some sort since there are so many boss islands already.
Premium zone could be something actually good, i saw a suggestion about adding Callisto to the game. That one could be easily moved to Premium aswell.
5. Donator Shop
Scale the prices to the correct ones. There are so much items not worth buying with Donator points, for example nex sets. They could easily be dropped by half to like 15 donator points. Hybrid sets could go for like 20 points. Just a notch down but still its something.
6. Cosmetic NPC / Events
Like an easter event where there would be a NPC dropping Basket of eggs / Bunny ears or something. Would be a fun thing to add some events overall that last for like a week or so. Add some things that are only available during these events.