Hell yeah some changes

Mod Edit:
We've tried to make this PTR focus on extending the early and mid-game experience, allowing players to remain competitive on one to three bases for longer periods. We’ve introduced changes to make non-warped Gateway play a more viable path, while also increasing overall strategic diversity across all three races.
In addition, a range of quality-of-life improvements has been implemented to enhance the overall player experience.
Economy
Starting workers reduced from 12 to 8.
Default Large Mineral patch resource count reduced from 1,800 to 1,600.
Default Small Mineral patch resource count increased from 900 to 1,200.
Total Default Minerals per base increased from 10,800 to 11,200.
Default Vespene Geysers' resource count increased from 2,250 to 2,500.
Total Default Gas per base increased from 4,500 to 5,000.
Rich Vespene Gas Geyser harvest return value decreased from 8 to 6.
Zerg
Hatchery, Lair and Hive
Supplies provided reduced from 6 to 4.
Creep
Spread/Recede rate slowed from 0.45 to 0.55.
Spore Crawler
Damage against Biological increased from 20 (+10 Biological) to 20 (+15 Biological).
Carapace Upgrades
Level 1 cost decreased from 150/150 to 100/100.
Level 2 cost decreased from 200/200 to 150/150.
Level 3 cost decreased from 250/250 to 200/200.
Infestor
Microbial Shroud range increased from 9 to 12.
Microbial Shroud can now be cast without requiring an upgrade from the Infestation Pit.
Neural Parasite on builder SCVs will only expire at structure completion.
Now has an auto-attack weapon.
Viper
Abduct now considers Sieged Tanks a valid target.
Overlord
Speed without Pneumatized Carapace decreased from 0.9 to 0.7.
Can now issue 'Load Nearby Units' commands.
Overseer
Changelings automatically inherit the current order queue of the casting Overseer.
Changelings’ deaths are contagious to other nearby Changelings.
Mutalisk
Mutalisk Glaives now prioritize targets.
Arc slop increased to 180.
Terran
Command Center
Supplies provided reduced from 15 to 13.
Ghost
Supply increased from 2 to 3.
Health reduced from 125 to 100.
Attack damage changed from 10 + 10 vs Light to 20.
Attack range increased from 6 to 7.
Steady Targeting:
Damage increased from 130 + 40 vs Psionic to 170.
Energy cost increased from 50 to 75.
No longer cancels upon taking damage.
Medivac
Can now issue 'Load Nearby Units' commands.
Subgroup Priority:
Priority order updated from (Raven, Ghost, Battlecruiser, Marine, Marauder, SiegeTank) to (Ghost, Marine+Marauder, Raven, Battlecruiser, Siegetank).
Protoss
Nexus
Supplies provided reduced from 15 to 13.
Warpgate
Warpgate Research moved to the Gateway from the Cybernetics Core.
Warpgate Research speeds up Gateway unit production time by 35%.
'Transform to Warpgate' cost increased from 0/(0) to 50/(50).
Warp-in Time is no longer determined by 'slow power fields'.
Warp-in Time decreased to 3s (from 3.6s and 11.4s).
Warpgate Cooldown Values:
Zealot: from 20 to 22.
Adept: from 20 to 22.
Stalker: from 23 to 22.
Sentry: from 23 to 22.
High Templar: from 32 to 35.
Dark Templar: from 32 to 35.
Gateway
Pre-Warpgate Production Time Values:
Zealot: from 27 to 28.
Adept: from 30 to 28.
Stalker: from 27 to 28.
Sentry: from 23 to 24.
High Templar: from 32 to 40.
Dark Templar: from 32 to 40.
Post-Warpgate Production Time Values:
Zealot: 18.
Adept: 18.
Stalker: 18.
Sentry: 16.
High Templar: 26.
Dark Templar: 2.
Sentry
Hallucinations automatically inherit the current order queue of the casting Sentry.
High Templar
Psi Storm total damage reduced from 110 to 100.
Disruptor
Now has a 'phantom attack' weapon.
Warp Prism
Can now issue 'Load Nearby Units' commands.
Bug Fixes & Quality of Life Updates
... read article for more, there are some nice fixes.