Greetings to the team blizzard, interesting changes proposed, here I left you my personal comments:
Movement speed increased from 3.375 to 4
Acceleration increased from 2 to 3
This allow escape to the Oracle, also allows you to hunt and destroy much more easy and effective workers, if the opponent does not have defense AA or kills their Queen in the zerg case and the oracle surprises them simply must pursue the lot of workers and ensures that they will be destroyed.
Research cost decreased from 100/100 to 50/50.
This will turn the game much more aggressive and dynamic since the beginning, wich will change the metagame, for example the terran so often, thanks to the oracle and the new burrow has to open with turrets, which is interesting; the problem is that the terran is still a somewhat insufficient and hard initial Macro and in theory this change will become a little heavy.
You are changing the 3 MU and above all we will see more roaches in play from the beginning.
Maybe the solution in ZvZ in matters from bane-ling wars.
Damage increased from 15 +15 vs. biological to 15 +30 vs. biological
This change is so much, the players can abuse a lot from spore crawlers if you realize. I would recommend first see how works the new burrow which is much more dynamic and allows the zerg player to be aggressive from the beginning, the tree that unlocks roach openers are much more effective with this new change, Roach-Hydra gameplay and if there is initial pressure this do not give enough time to the zerg to go by Mutalisks because they have to defend or lose their expansion.