A lot of good posts here on why DQX wouldn't survive in current MMO generation.
I believe the only way SquareEnix could make this work is by translating the PC version of DQX, without the concept of full localization.
No new servers. They'll be dead so fast.
We'd just jump in on the current JP ones after downloading the English client.
No crazy marketing or console boxes.
The entire point is to let western/global players jump in easily without the VPN hassle, pay the monthly-fee and purchase the expansions/DLC online.
Again, this would only work for the PC version.
If they just attempt on any kind of console localization, it'll be way too much trouble and they'll give up on the low sales.