Ooh, nice. I'd love to test it out.

Pros: I like this map. I like it a lot, and I think now would be a good time for me to finally say something after I downloaded it about a month ago. REALLY BIG. In my opinion, this isn't a bad thing. This is REALLY good. All the many different ways to get from here and there complement the size, making it easier on the offense, yet making it a bit easier for the defense to select chokepoints (although you can't just stick a sentry anywhere). I've played the es version of this map, and I like this one more. Masterfully designed map. My favorite checkpoint is the 5th one on that long bridge.
Cons: Now let's talk about that payload, lol. I'd suggest removing the entire mechanics of the payload and just start from scratch using the simple tutorial on the payload. This is the only true flaw I found. The jerkyness, which was also in the es version is annoying. You can't stand on the cart, you can't jump in front of the cart without expecting it to knock you forward 50 feet...and you also need to set the capture award to a longer time. I now have 35 capture points as my record for a HEAVY because of it, lol. I want a ka-boom at the end, an earth shattering KA-BOOM. Of course, that's just what I want, and not something to be taken seriously. This map CRIES for time extensions. For a map this big, you gotta do it. No way out, and it has to carry into the next stage if possible. From the feedback I've read, there are spawn issues. However, I've only looked at this map myself and tried it on an offensive standpoint, so I don't know the deal on that.
Improvements: Fix the payload, fix the spawns, add time for checkpoints. That's all really
Notes: I love you for making this map :P Great job on it, and I wish to see more work in which you may be doing in the future

nop, i only use red spawn points in the red respawn rooms. the rooms aren't shared by the teams.

Stino.... I would do #2.

Some of the rounds are quite large so, I do think that having forward spawns is a good idea, just enable and disable the player spawns and spawn rooms where the point is capped.

To better explain my point about fencing off; in dustbowl, after a round is finished you respawn, the entirety of the previous round is blocked off by fences which appear after you respawn. In your map I can still access the areas in the tunnels from the previous round, and despite the agets blocking that route off, the gates are far too far backwards.

I mean literally fencing off the area behind the attacking spawn with the security fences so the attackers go towards the cart and not away from it.

I hope I was clearer then :D