Cross-nation servers (or whatever they are called) offer many benefits and I don't want to see restricted EU, JP or NA only servers introduced.
Players are on at all times of the day- when I get home in the evening and logon, even if JP and EU people are going to bed then NA players are coming online (I'm GMT). If I was on an EU only server and wanted to party late at the weekend then it would be harder to find people online to do that with.
Economy- people from around the world buy at different times of the day; i.e. if I go to bed with a bazaar up then there is a chance that a JP player might buy something from it. If I was on an EU only server then most people would be in bed the same time as me and the likelyhood of me selling bazaar items would reduce.
Ok, so maybe not the best examples but I'm sure many of you know what I mean.
Besides, I like talking to people around the world and I have had good times doing events in Linkshells with people in Japan, America, Germany, Holland as well as the UK both in FFXI and FFXIV. I don't see the need to change it :)
