[X]Aleksandr Vasilevsky
[X] 35% GNP: Through the re-direction of additional party funds towards the plan of industrialization and military production, it may be possible to far accelerate the pace of acceleration. This quantity is the maximum VSNKh economists believe can be utilized before major problems occur. (435 Resources per turn) (-15 Party Influence)
Negating the Great Purge leadership malus is too huge an opportunity to pass up. Having tons of gear but not leadership would just result in a lot of captured equipment anyway. Plus not having lots of equipment will make the Politburo hesitate about invading Finland or Poland, thus making sure that the Soviet Union is not the aggressor in the coming war. We will keep the moral high ground.
As an aside, the Soviet GNP grew from 500 Resources to 1243 Resources in 5 years.
I'd prefer an actual high ground to a moral one, honestly. But the problem is, the world is seen as hostile by soviet leadership, and not without reason.
In our position, averting the Polish Campaign needs butterflies to the tune of Entente allying with USSR in first half of 1939, or France declaring during the First Sudeten Crisis. As we're controlling VSNKh and not foreign ministry or Third Internationale, we can't really be proactive about it.
The Winter War has a valid military reason as well - as it is, Finnish border is far too close to Leningrad (Which is still a second if not first city by industrial output in USSR). But it is more feasible for us to prevent - that reason is only valid if finns could conceivably be considered hostile.
That Mikoyan could affect, due to his experience with import-export; If we tie Finnish economics to USSR tightly enough, then nobody would think of the possibility of Winter War.
All my humble and wrong at least in some respects opinion, of course.