I say no to this one.

FFXI played out alright on the 3 country main scenario's I don't see why not for FFXIV, once you finish one country (in future) just let us start over another country or something then I'm all good. Just make sure we don't lose anything when we switch companies later on... like FFXI deliveries was pain in the butt....... ><

Only part I'm worried with this is what if the 3 countries have different reward/gear that may cause issue, but maybe they may add quests where any grand company rank can take for some quests so you still can accumulate the company seals then it should work out.