I've jumped around as soldier a bit and come to the conclusion that the map is a bit too big between points, especially if you're on the defensive. Let's say you wipe their push, and as a soldier you start moving from near the point straight to the cap. A reasonable amount of jumps and speed gets you to the second point in 10 seconds, when at least half the spawn wave timer has elapsed for those who just died at the very end of the fight.
Conversely, I pushed from the forward spawn on mid to the second point with soldier, and found 2 routes that actually get you to the chokes/front lines of second within 7 seconds.
I did a video but it didn't record audio :/
Basically: make the map smaller, make the second point easier for other classes to use, the lower part of the cap on second is a death trap for any class that isn't explosive or scout. Sightlines are too big, map takes too much space from last to second (1.5 times longer than Granary Last to Granary Second maybe).
Keep working on the mid. It's a great start, but the sightline from spawn is too strong for sniper in forward.