Karelian Isthmus - Winterhorde Onward Ride
You may not be happy with this but I could not see any way in which the Soviets would be attacking from the north and seeking to exit to the southeast - back to Leningrad? (And I really want to believe that up is always North on our maps.)
I scoured the internet for detailed battle maps of this area but could not find any. The more general ones that I did find, like below, all show the Soviets attacking from the southeast and east.

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So I took the liberty of flipping the opening Soviet positions; specifically doing the following:
- Extended a road along the northern bank of the river to the southeastern map edge.
- Relocated the Soviet supply hexes to this spot and another one on the southern bank.
- Moved the Soviet columns to these two roads, just entering the map and keeping them in order.
- Moved the "1905," "1910," and "1915" spawns to these two roads, keeping AI teams together.
- Tweaked the Soviet activation triggers to have AI teams move south to north (also, see below*).
- Placed two Soviet exit hexes on roads at the top of the map. Removed the previous exit hex.
- Pointed the "Prevent any Soviet units from exiting the map" objective to these hexes.
- Restored northern areas to Finnish ownership.
- Added a few more Finnish deployment hexes to deal with the enemy's changed positioning.
- Sprinkled some more +5 supply points in Finnish territory (they only had 20 to begin with which is insufficient for 52 land CPs).
- Generated a new map preview image.
BEFORE

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AFTER

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Other changes:
- Made Terijoki a primary VP even though it's a secondary objective, "Hold Terijoki at scenario end."
- Moved the "Get 1 commander" to that objective.
- Named the capture point in the southeast (Finnish: Kellomäki) that is close to the Soviet incursion.
- Renamed the three objectives in the west with Finnish (instead of Russian) versions of local village names.
- *I detect a tough scenario; the Finns are greatly outnumbered especially with Soviet spawns (approximately 15 units vs. 36). However, in a test run against no opposition, I found that the Soviets could not make it across the map in 16 turns regardless (the same would have been true in the reverse direction) so in fairness, I bumped the number of turns to 18.
(By the way, now I'm in the opposite seat: If you need to address the gameplay balance a bit, my preference would be to add to the Finnish CP's and RP's rather than removing enemy units because triggers are tied to them.)
This is the tack that I am taking with briefings in this campaign. No, I am not trying for Finnish-accented English; that was hard enough with the Scots! Instead, I have researched some Finnish phrases and will use them occasionally (along with translations which, by the way, are somewhat imprecise according to the source; I tried to use the versions verified by Google Translate):

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I threw this in as an introduction, Turn 1. It looks cool in juxtaposition with the commander waiting to be assigned:

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This scenario has been uploaded to the "Back to Erik" folder.