The load time was one of the things that got me, as well as the cramped quarters! I actually didn't think of ducking Nukes in there. I thought they would've hit me down there too. Anyway, what annoys me most was the fact that when a map had those, getting from one end of the map to the other meant having to go through them, and it wasn't clear which entrances led where.
yeah, some of the layouts were confusing, some weren't that bad :P I recall so many times I was playing a campaign level where I had to destroy all tanks and couldn't find one enemy cause they were hiding underground somewhere lol