I'm gonna make some quick comments about the main complaints, I'm not counter arguing any of the points made in that text. I'm just putting down what my thoughts are on the topics, and what I reasoned when I built them.
1. Middle area:
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It's already the size of 2fort, even slightly larger. It's difficult to snipe in that area because there are wonderful long, flat sightlines inside the bases, I love them. Giving snipers a place to just stand around will not benefit the gameplay at all.
There are medium health packs just around the corner in one of the entrances, very accessible to people fighting in this area.
I tried to balance size vs traveltime from spawns, this is the result. Making it larger will also make the map a lot slower, and I figured people want more action in a game like TF2.
2. Tracks close to spawn:
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It takes the cart about 4 and ½ minute to make a full lap. If the tracks are too far away from the spawn the defenders feel really useless, it's already difficult to protect the briefcase, I don't see a reason to make it easier.
Every now and then the cart passes infront of the spawndoors, it's a way to keep the pace of the map under control. It's a time where people can regroup and take a breather. A losing team might use this time to rethink their strategy and turn the game around.
3. Spawncamping:
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There are 2 exits. I see very little traffic to the secondary (floor exit), and I can't figure out why.. It's often a very good choice.
I takes really uneven teams to get spawncamped. The people inside have all the advantages (locker, control of the doors, 2 exits). Similar to what I mentioned previously; when the cart is outside spawn that is when defence has the upperhand, not the other way around.
4. Engineers:
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Just because you can't place a sentry that guards the objective directly, doesn't make the class obsolete. Sentries are area denial, place them in any spot with high traffic and their job is done.
BTW. I play almost exculsively sniper, and I can't believe how many "sniper unfriendly" comments there where, it's paradise I tell ya!
Very nice to hear directly from players what they think though! I appriciate it, thanks!