The map feels and looks unfinished, even just by walking through the map. Firstly, the map is really small with buildings and filler walls in huge proportions.
The spawn room is dark and tiny, and there's no cubemaps in them, which gives my gun in the viewmodel a weird shine. Make it bigger and add some lighting to it.
The courtyard is pretty big and makes a small trip to the only way out of the courtyard. There's also no cubemaps either. Try scaling down the courtyard or make the spawnroom bigger.
And having only one door out of the yard and into the corridor to the point can be a really bad thing in a map. An engie can build a sentry there and just Rancho Relaxo as almost everyone gets pulverized by the nest. Basically, the only thing that can stop the sentry would be a spy slipping through or an Uber, which shouldn't happen.
Here's a picture showing how the sentry is OP in that position, especially with the ammo box right next to where the sentry can fire at anyone who opens the singe doors:
And one the gates out of spawn literally just shows you a wall with no directions or anything
The corridor is both long enough to take a heavy atleast 5 seconds to go through and short enough for a sentry to camp. There's no lighting there either
The cap itself has no cubemap and the threat of the train can be near nonexistent because the cap area lets you cap outside of the track. The cap time is pretty long, too.
And getting pickups could be a challenge because everyone will be flocking to the only two pickups on the map and with a train that pops up every 15 seconds or so, it ends up dividing where you could go, and it could kill you because most of the enemy team is on that end. It also breaks the flow of battle. And when you get on an empty cart and die, you can see a leak.
Overall, the map is definitely far from beta as the thing suggests. The layout and many other things prevent it from being a good map. Needs lots more work to even be considered beta. So get to it and hope this feedback can help this map be a great one.