If they actually have "fresh start" servers it will ruin 2.0 for a very simple reason.
A server that has massive inflation is very different from a server with a balanced economy
Put another way:
Would you apply the same economic policies to a country who's currency is experiencing hyperinflation, as you would to a balanced country?
The answer is no... unless you want to kill the balanced country's economy.
Put another way:
Old server > average gil is 40mil per person
New server > average gil is 2 mil per person
each server would require -very- different policies.
In order to maintain an economy SE needs to develop a balanced system of gil outputs (gil exiting the games economy via airship travel, npcs, etc) and gil inputs (gil entering the economy via leve rewards, mob drops, etc)
Now lets say in a game where everyone has 2mil gil average you create a system where you hold gil inputs and outputs equal. Or slightly higher gil inputs than ouputs. And this system keeps everyone in the game at a gil possession rate of 2mil on average. That works just fine.
But what if that system gets applied to the old servers where people have 40mil average? It essentially creates a system where everyone on the server generally retains that 40mil average, but only allows you to ever get 2mil on average more out of the game. All the people with 40mil+ (me being one of them) will sell good items for multiple millions, which new players will never be able to afford. New players or current players with less than 40mil will have to sell high-demand items to old players to get gil, but it will be incredibly difficult to generate the start-up gear in order to get those high-demand items.
The point is, if they have 2 servers with drastically different economic situations, they will be unable to implement any policies or hot fixes to balance -both- economies.
There are a few solutions but since SE has no concept of how an economy works they will probably never be able to pull them off.
1. gil sink out 90% of the gil prior to 2.0.
2. implement different policies for new and old servers
3. mass-ban all the botters who are holding on to 200+mil from fish bot > alc bot > npc
4. get rid of gil all together and create a new currency
the sad fact is this game has been exploited and botted without repercussions for the past 2 years. And if they treat the old servers the same as the new, one of them will lose out and will have an economic collapse. And that will ruin 2.0 at least for some servers.