http://us.battle.net/sc2/en/blog/19801932/legacy-of-the-void-beta-balance-update-preview-june-9-6-12-2015
New Ghost Ability
Ghosts would gain a new ability that spawns a flying drone on an enemy target. That drone would channel a beam at the enemy unit, reducing its Armor by 3. The drone would have a fixed duration and can be attacked and killed. The main purpose of this ability is to help Terran bio armies better deal with a current weakness—high armor targets.
Ghost Movement Speed Increase
We’d like to try this one out to see if Ghosts can be better combined with other bio units.
Individual Overlord Transport Upgrades
After testing out this popular suggestion, we decided to give it a go during the beta. We feel that with the Nydus Worm changes in Legacy of the Void, doom drops have been buffed with the Nydus Worm, so we wonder if Overlords can be served for the small drops.
New Upgrade Reducing Medivac Unload Delay
We were exploring various upgrade replacements for the Medivac, and tried upgrades ranging from providing straight-up power in combat to various utility upgrade ideas that change up their gameplay. We decided to try reducing the unload delay because we feel that Medivacs don’t need to be buffed in strength in main engagements, but we wanted them loading and unloading in various locations throughout combat or during harassment.
Disruptor Damage Increased from 145 to 145 +55 Shields
Disruptors aren’t very effective in the PvP mirror matchup, so we wanted a targeted change that only affects that matchup.
Ravager No Longer Has the Armored Flag
Ravager is looking too fragile now, so we wanted to buff its survivability.
Viper Parasitic Bomb Ability Cost Increased from 100 to 125
In larger fights against many air units, the micro we wanted to see wasn’t happening if too many Parasitic Bombs were used at once. So we wanted to reduce the number of Parasitic Bombs being used per combat situation so that we can see the micro and counter-micro a lot more in engagements involving this ability.
Armory Ship Upgrade Costs Reduced to Match Vehicle Upgrade Costs
With the upgrades being split out again, we felt the choice of committing into the specific tech routes is cool, but we wanted to make each path similar in terms of investment needed.
Spore Crawler Damage Decreased from 15 +30 Bio to 15 +15 Bio
While the Lurker add is working well in ZvZ in terms of transitioning out of Roaches, we’re seeing that fights are generally trending to be ground-based only. We’d like to have the option to go Mutalisks in some ZvZ games, so we’re reducing the +bio damage of Spore Crawlers. We’re looking for Spore Crawlers to still counter Mutalisks well, but at the same time, we don’t want Mutalisks to almost never be used in the matchup. We think this is a good starting point to get the damage value of Spore Crawlers to the right place, but we can continue tuning it as needed throughout the beta.
Worker Counter Change Displays 2 Per Mineral Patch Instead of 3 Per Patch
While 3 workers per mineral patch is the max efficiency, 2 per is optimal in multiplayer games of SC2, so we decided to try out this change in the beta.
Liberator AG Search Radius Indicator Is a Dotted Circle Similar to Siege Tank in Siege Mode, but the Ability’s Startup Still Displays the Animation
This change is due to performance issues caused by potentially having so many splats in a given spot.
