I know what you're thinking.  Sacriledge, right?

Training Facility with rockets or rifles is becoming one of my most hated settings.

It works terribly with the lag, especially inside the maze beneath the metal grating.  The way the metal grating works is weird; sometimes projectiles go through it, other times not.  It sucks to get trapped underneath someone who has a rifle and knows what they're doing/uses a kbm.  Guaranteed headshot, there is nothing you can do.

When you get into an engagement on top of the grating, it's also very boring.  You're invariably going to be using rockets, and it comes down to waiting until your opponent runs out of ammo unless you get too close and realize he has energy grenades or something.  I try to never go up there unless I have an energy gun or sniping weapon; it's the obvious and boring solution to a braindead problem.

I wish this popular map would be replaced with Crossfire City.  That is one of my favorite maps and I don't understand why it doesn't get more attention.  It does seem to tax the system more on PC; I've run into framerate issues and had friends do the same.  I wonder if this problem also presents itself on 360.  Still, I'd rahter play a fun map with the occasional framerate issue than a boring one.