What happens when Primal & Crystal get full too?

[Sotaris]

At that point they force kick all RPers in Limsa /s

If it keeps up I wouldn't rule out new servers in 6.x. Same goes for EU.

Many from this surge of new players I doubt will stay indefinitely, after a couple months of EW the load should lighten a bit. Launch is a different story though.

Yep, so expect unchanged situation or worse for say 6 months or so. Roughly until 6.1 or bit before then.