So there are some issues about the map dm_flood_1-35, so lets get to the point.

Lava: People intend to cap for the fun of it but it makes worse red team than the hale. Usually at a level 3 lava level, it kills half of the team while hale teleports back to spawn when touched.

Sentry spots: Let's say it's pure hell on this map. They can be placed around the map with edges around them and in the middle, and in different floors. Had to place some nobuild zones to balance it somehow but overdoing it will make them useless.

Teleport hales: Those hales will have a nightmare on this map. If they are pushed down, they have to climb up taking nearly 2 minutes. When they are finally up they are getting pushed down and must start over again. Teleporting is just going to make pushed down again from sentries.

Easter egg: Alexander found out an easter egg that could make an issue to especially new players, because it's difficult to discover by them. What it does is teleporting you to a secret room which also leads back to spawns. Can easily camp there against a hale who doesn't know how to do it.

Video:

As the topic says, there´s some problem with this one i agree with thunder about this.

This map has been removed.

I got a question:
Is that a "self-made map", ?

No.
http://tf2.gamebanana.com/maps/183604

Oh, okay ^^".