I'm bored, so I'm going to just leave this here:
Trading: remove hat trading, only allow guns, and other items except for VIPs.
Map: I think you should use Classic's strategy. Though it was a bit easy for Classic to do since they've already got all the contents reserved from old PC Classic, but create new places but don't open them yet until the server meets a certain amount of playercount. Release a town slowly, piece by piece. Not everything at once.
Hire more staffs. I know it's hard to hire professional developers for iZone since it looks terrible, and according to some of the previous coders for iZone such as Emera, some of the codes are terribly done. But start out by paying them.
ZP: Stop hiring kids who abuses for friends, so increase your standard. Make the application more harder to apply for.
Jetpacks: I know it's weird to say this, but I suggest removing it lol. I used to like it where there's no jetpack and you have to walk everywhere. It's also fair for events too. When staffs host events such as hide and seek, those who own a jetpack will always have the advantage.
Bases: Bring Sky Bases back, or add more bases like SB.
Sparring: Loved Zone sparring since 2013, but always wondered... why tf are there no sparring rewards? It's been 2 or 3 years or so since we've been asking for rewards.
Shops: Remove the shopping area lol and spread the shops apart. That gives players the opportunity to explore.
Quests: There's currently 1 quest released for iZone lol. Make more.
Bikes: Give it 8 directions (if it already can navigate in 8 direction, ignore this idea)
Let Zone be officially in space; not on the Earth's atmosphere. Create other planets for others to explore. Create your own version of earth; create a city for us players to explore. Let us see different planets, species, races, shops, etc.
The above ideas has always been my dream for what Zone would become. Please, tell me if I'm wrong about something. I haven't log on Zone for more than 6 months.
TL

R? Don't quote me.