I know out of experience, that zalera and coeurl are extremely casual servers, as well as very low populated. That is one reason they are given bonuses right now, but you won't have any issues, if you like to play casually, craft and gather, as well as looking for housing plots later down the road. Just don't plan on raiding or usage of the party finder, when it comes to more progression orientated content, as well as current or old primals. Not sure which FC's are still on these servers, or active as of right now, most of the nice and good people moved to a bit more populated servers.

I would suggest this, make an alt on a world you're interested in, and talk to a couple of active fc's. IF you find a good home, you can always transfer the omega character over to the NA data center.