Thanks for your reply! Yes, I heard reports of NA version unable to allow Msia CC etc, need to go through Paypal via Crysta etc ...
If your concerns are correct, then I guess its better to have EU account with EU version ?
Can I register an EU account with same email address? No conflict?
However, Msia is not on the service country for SE EU, so still unable to purchase the game (I know we can buy it through GMG), however will this affect monthly payment in future?
Im same with you, SE account this and that, diff region diff account, so damn confusing and all not link together. Really, all I want is simple, to purchase the game from the official website, submit subscription fee and play. Don't know why so difficult and very very confusing.

(Ah and same, all these fuss just for Early Access! damn it!)

you can't register with the same email if your email had been used for the NA version