Can you provide evidence of this statement?
The first few things I find are at ends of your statement:
Concern 1
Concern 2
Concern 3
If it truly helped the economy, when I search for something along the lines of this topic, I should at least see some positive or neutral stances (knowing full well there will always be doomsayers and those expressing concerns). Also, it just sounds like WoW's economy is a bit F.U.B.A.R. as is and this just compounded it.
EDIT:
Speaking about this as someone who has never touched WoW, doesn't care for WoW, doesn't care to devote any real effort to find information regarding anything to WoW nor how hard it is to even attain gold in WoW. It doesn't change how concerning it is for a single 'token' cost as high as 590k gold in the last year of that game using
this site. If it was anything like an older game I played with a similar exchange as WoW, 200k-500k is definitely much harder to obtain and promotes throwing real world cash to progress that the concerns I brought up address.
The last thing I'd ever want to see in FFXIV is food or pots going for 100k per 1.