OP has no idea what they are talking about if they think the map moods affect frame rate even 1/10th of a frame per second.
Removing them would have absolutely no noticeable affect on performance.

If you want better performance, ask them to reduce texture sizes or something.
And in case you don't know, there is a way to reduce them a little bit in the options menu. Dropping the graphics quality to low will probably get you a few more frames. Also turn off nonessential sound, such as the dialog sounds. And use 720p output instead of 1080p. If you do all that, there will be a noticeable increase in frames.

But really, there should be an extra low option for textures. Like Playstation 2 sized textures. Real **** looking, but you'll get a steady 40FPS if you use them kind of thing.

Removing moods from everyone's experience is not the way to go about increasing your frames.

Then maybe it is your internet connection, I have two systems neither of which have SSD's or any enhancements, I run all maps at the highest texture level and at a stable 30FPS, I have encountered lag maybe 5 times in my entire time playing this game.

I have never encountered a drop in frame rate that wasn't associated to the lag.
So unless both my systems are somehow all powerful behemoths in comparison to yours, it's likely to be something on your end.

1) Ensure your only playing in your region
Do this by either setting your server options to automatic, or which if region best covers your posistion.
(I imagine you are north america)

2) Defragment your hard drive, their should be an option to do this on the system, if not use a computer.
Even SSD's benifit from a defrag every now and again

3) Check the health/lifespan of your SSD's it's possible that between, patches, DLC amd general game operation your SSD has degraded, especially if it is of poor quality.

As for your insults to my previous post, like I said before the Atmospheric effects are 'Pre-Production' that means theynare applied after the rendering is complete.

Unlike say night vision, dynamic fog, or ambient lighting. These effects are slapped on just behind your HUD, the amount of processing power that your graphics card puts into making this happen will be LESS than the proccessing power required to render your hud.

Furthermore the effect itself isn't even rendered or calculated in anyway, the effect is continous loop, the same sparks always flit across the screen in the same places, the operation of applying it to the screen is as simple as reading the raw data from your drive and adding their RGB values tomthe rendered image.

Once again, it's just a very fancy lens effect, it works fine on my systems with no lag or frame rate drop, chances are it's your internet connection. (Speed doesn't mean squat, but I leave that until you turn roujd like a baby saying you have an 80mb/s connection)