Higher movements speed along with rework of Purify and Recall is what the MS Core gets in the latest update. Oracle, Widow Mine and the Swarm Host are also targeted.
Protoss
Mothership Core
= Purify has been changed to the following:
Purify can now only be cast on your Nexus at max 10 range.
Once cast, the mothership core will attach itself to the Nexus, transforming into a weapon with range 10.
While attached to the Nexus, the mothership core will be unable to cast abilities and regenerate energy.
The damage of Purify has been lowered to 20 and can attack both air and ground units.
Purify will last until cancelled.
= Recall has been changed to the following:
Recall is now a simple cast-and-click ability on a player’s Nexus.
Once cast, the mothership core and every friendly unit within a 7-range radius to the core will be recalled to the Nexus.
A new ranged weapon called Repulsor Cannon has been added to the mothership core while in its mobile state.
Repulsor Cannon deals 8 damage to ground units with an attack speed of 0.85.
= The cost of the mothership core has increased from 50/50 to 100/100.
= Movement speed has increased from 0.47 to 1.875.
Oracle
= Health has increased from 20/80 to 60/100.
= Speed has decreased from 3.75 to 3.375.
= The duration of Entomb has increased from 30 to 45.
Terran
Widow Mine
= The duration of Activate Mine has been decreased to 2 sec.
= Auto-cast can now be turned off in both activated and deactivated modes.
Zerg
Swarm Host
= Locust attack range has increased from 2 to 3.
= Locust damage has been reduced from 14 to 12.
Bug Fixes
Battle hellions can no longer load into Bunkers.
The splash damage from widow mines will no longer hit friendly activated widow mines.
The Stargate Command Card now properly includes a Set Rally Point button.
Swarm hosts now have proper collision while burrowed.
Why those changes, however? In a bluepost, lead balance designer David Kim explains that previously the Mothership Core was driving part of deadly all-ins on some maps/positions, which has been limiting to some extent. That's why the changes to the unit are as we see them: Purify has been made exclusively a defensive skill and so has been Recall to some extent. Players will no longer be able to fly the MS Core into an enemy base and recall their entire force but will rather have to drag the MS Core along with the main army, using it as an escape mechanism when an attack goes bad (which, as we remember, was Recall's design philosophy all along).
According to Kim, further down the development process are the goals of making the Widow Mine a core terran unit and a reevaluation of Oracle's Phase Shield to make it more appealing it more situations other then removing Fungal Growth. Additionally, more HotS maps as well as some WoL once will be added to the ladder at some point.
Source: Battle.net
