Castle is a spamfest, yes. But Aqua has an über-fortified final point which makes 3-3 results much too common (also some people are annoyed by the HDR on white lamps in numerous places, personnally I'm not but I've heard this complaint more than once). Boulder's rounds are stretched too long, which makes for tedious walks for every second cap, and 1-1 scores when there are six points to cap don't please anybody on the server. Vulture can't be entered into a regular server rotation due to alpha textures.
So in the end, Castle4 may be a spamfest, but if you want a custom multi-stage A/D map there really isn't that much choice. I'm eagerly awaiting for Vulture to reach beta status - for now, we don't have any multi-stage CP besides Dustbowl (we have Gydan and Broma as single-stage though).