SC2: Many ability swaps to come

Also, does the Firebat have any special abilities for instance one that makes a wall of fire and is channeled? Is there anything fresh that we haven't seen for the Firebat?
The Firebats are back with the same fire loving attitude, but with added Hit Points to help them get real close to their enemies. Firebats also must be produced from the Factory rather than the Barracks from the original StarCraft, since their suits are larger and able to sustain more enemy fire.

The High Templars appear to have an attack coming from their hands. Do they now have an attack of their own, or are they channeling the barrier spell?
We are currently experimenting with giving the High Templars a standard attack, just enough to keep him out of trouble, but not actually powerful enough where you would want to use them as an offensive attack unit. The High Templar's primary role is still to be a caster of special abilities.

But... wait, wasn't Force Field moved from the High Templar to the Stasis Orb?
Over the past month and coming months, there will be a many ability swaps. From week to week, it could change significantly. Nonetheless, I'll try my best to keep you guys updated. At this very moment, the Twilight Archon is being tested with some of the original StarCraft High Templar abilities.

[Regarding Destructible Doodads] So are destructible attackable by all units or just high damage units like Siege Tank/Colossus? Can you click on the rocks and stuff to see their HP or anything?
The rocks will have viewable Hit Points and can be destroyed by all units. In some maps, this type of environmental interaction could allow access to both 'secret expansion locations' as well as 'secret paths' to an enemy's base. Knowing the maps well will be crucial to the strategy involved in multiplayer skirmishes.