Rollback before the Legendary essence/dust

[Hamsterino]

The drop rate is much lower, especially for a new player like me who just started playing recently.   

The drop rate shouldn't be lower because you're a new player.

Buying from players is too expensive 

Now it is, which is due to essences.

I have played for more than 30 days and no legendary items have dropped.

Looting a legendary item every 30 days would be pretty lucky; if I was you, I wouldn't expect any loot at all.

In fact, I have been playing for 30 days and only got 3000000  Gold         I basically play all the time.      Can't afford the legend I need     

3mil wasn't enough for a lot of red legendaries even before the update. This is the grind that NordInvasion is about, I guess.

My friend told me that it takes 16 players to get a normal drop rate.     
In fact, I rarely meet 15 players.
Usually 2~9 people    

Your personal drop rate isn't influenced by how many people are in a server. The only advantage a full server has over  is that more players means more nords spawn, which in turn means more chances for you to loot (aka assist xp lines).

Hopefully, the drop rate of Legendary Loot for new players can be increased.      or Increase my Gold income  

Not that the loot system is balanced right now, but increasing the drop rate for new players most likely won't happen. The chance to loot something is supposed to be the same for every player, including new players. Also, increasing your personal gold income would be wild, just like increasing the gold income of everyone. Guess what happens when everyone gets rich...?

There is a huge gap between the price of Legendary Loot players trading and the income from in-game Gold

There is no such gap, it just takes a certain amount of time to be able to afford this or that legendary, and recently that time increased a lot, because every legendary is worth at least one essence now, which are being traded at 2,5mil.

The drop rate is much lower, especially for a new player like me who just started playing recently.   

The drop rate shouldn't be lower because you're a new player.

Buying from players is too expensive 

Now it is, which is due to essences.

I have played for more than 30 days and no legendary items have dropped.

Looting a legendary item every 30 days would be pretty lucky; if I was you, I wouldn't expect any loot at all.

In fact, I have been playing for 30 days and only got 3000000  Gold         I basically play all the time.      Can't afford the legend I need     

3mil wasn't enough for a lot of red legendaries even before the update. This is the grind that NordInvasion is about, I guess.

My friend told me that it takes 16 players to get a normal drop rate.     
In fact, I rarely meet 15 players.
Usually 2~9 people    

Your personal drop rate isn't influenced by how many people are in a server. The only advantage a full server has over  is that more players means more nords spawn, which in turn means more chances for you to loot (aka assist xp lines).

Hopefully, the drop rate of Legendary Loot for new players can be increased.      or Increase my Gold income  

Not that the loot system is balanced right now, but increasing the drop rate for new players most likely won't happen. The chance to loot something is supposed to be the same for every player, including new players. Also, increasing your personal gold income would be wild, just like increasing the gold income of everyone. Guess what happens when everyone gets rich...?

There is a huge gap between the price of Legendary Loot players trading and the income from in-game Gold

There is no such gap, it just takes a certain amount of time to be able to afford this or that legendary, and recently that time increased a lot, because every legendary is worth at least one essence now, which are being traded at 2,5mil.

Don't give up though, it may or may not get better in the future, there's always hope.