Like you, I greatly dislike ATCS (primarily because I played 956,342 times too many), but I have to admit that this version is at least more interesting than the original atcs in how it starts with the walls.
The walls allow both teams time to more freely build in unconventional areas (like the hall and the bunker areas). additionally depending on which team gets to the end first also has an effect on how each team builds as there are some advantages to getting to the end first. Not to mention the access through the hall opening up before the outside access does create an interesting dynamic as the combat starts.
With that said, yeah we need more original quality arenas.