We're 1/4th done.
Not that many changes were done to Soviet Mission 03: Happy Birthday except for the standard 'making things easier on Easy & Normal' and additional reinforcements to make the mission go faster, especially in the base vs base stage. There are still many surprises waiting for Morales on Mental so keep watch and make sure he isn't ambushed by the enemy.
Yuri's Epsilon Mission 03: Scrapyard has been somewhat modified - there are less explosive barrels and traps in the oil fields which make the risk of blowing up all Oil Derricks too soon a smaller one, as you can even see in this video. The barrels around one of the Oil Derricks explode violently but don't destroy the Oil Derrick. Acquiring $10000 on Mental in a reasonable amount of time is still tricky.
Allied Mission 04: Heaven and Hell has been updated heavily. The most important change is a bugfix: the mission will now end properly once you eliminate the primary structures in the Soviet base after you're done with all other objectives. Tanya replaces the Navy SEALs and there's a Medic with Engineer joining her at the very beginning of the mission.
Placement of some obstacles has been modified to create a challenge for laser-powered Tanya, including Buratinos that you should probably not approach with her but take out with your Rocketeers. A safe passage through the enemy territory for the Rocketeers will be revealed by a Stormchild so that you don't have to guess where enemy anti-aircraft defenses are anymore.
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