GENERAL Fixed an issue with placing infusers in the infusion window. ZONES/POPULATION Solusek Ro's Tower: Citadel of the Sun [Raid] Grezou should no longer heal from a random brazier when it is drained of heat. Any other sources that he heals from should still be present. ITEMS Corrected a bug with Warlord's Insight that caused it to be an activated effect instead of passive.
Beta is only available to those that Pre-order the upcoming expansion, so Yes. They may open beta to all, as in previous expansions, for the last few days before Beta shuts down, but don't take my word as I am not sre if they will do that.
Public Test is not the same server as Beta. You should still be able to log into Public Test without buying the xpac. (The update notes above are for Test, not Beta.)