For the people who haven't noticed them yet the 2 mystery talents previously missing have been now added (or so it seems):
Cascade
40 yd range
25 sec cooldown
Launches a Holy bolt at the target that grows in power as it travels, which causes up to 1 damage to an enemy, or up to 1 healing to an ally.
This effect can bounce from allies to other allies, or from enemies to other enemies. Each time it bounces it will split into 2 bolts, preferring farther away targets, and never hitting the same target twice. Cascade can bounce up to 4 times.
Halo
30 yd range
2 sec cast 1 min cooldown
Creates a ring of Holy energy around you that quickly expands and grows in power, up to 30 yds away. Deals up to 1 Holy damage to enemies, and up to 1 healing to allies, with the greatest effect at 25 yds.
In addition halo doesn't seem to be castable at shadowform, but Dark Halo (does the same thing as halo except the damage is shadow instead of holy) currently exists in the database as well which should be.
Feel free to discuss from my point of view these seem some rather interesting talent concepts. Would also like to point out that i'm not in the beta yet so i have no idea if the spells actually exist in this beta build since they have been discovered from the database.