Of the systems completed for PA5 (with varying degrees of polish and tuning), we offer a Chat System; Basic Climbing; Atmospheres; Climates and Acclimation; Perception; Basic Travel tools (like binding and gating); all classes are currently playable; world and player persistence (this creates the ever-living world regardless if you are online or offline); a basic pet system; basic crafting and harvesting; unique NPC Behaviors and Dispositions; a further-refined UI; a faction system; and an updated combat and resource system.
What’s left before we open up PA5? This list is a lot shorter. The living codex that governs the spell and ability system is in progress. We are refining and tuning some of the above listed systems, something that will continue through Alpha and Beta. Apart from that, it’s mostly content work -- finishing up zone areas (Faerthale has several play spaces, the last of which is currently under construction) adding population, itemization, more quests and storylines.