Meson Goggles: To change, or not to change?

[69andahalf]

Spoiler!

What is the difference between 'Option 3 Mesons' and thermo-vision Goggles (or night-vision goggles, what you call em)?
Just the see-through-cloak thing?

Edit: Had another look at the images, I get it now. Meson-3 is closer to the original function of mesons, to see construction through construction.
But now I don't understand the dichotomy; Why do the new mesons need a nerf?
Didn't old mesons have the exact same practical effect of allowing you to look through walls, only at other walls/floors?

Edit2: More looking, more understanding. Yes I see the advantage you would have with the new mesons against someone without them.

Now for some actual contribution:
What about this for a downside?: objects and people beyond a 3-tile radius are invisible, just like the are not visible through walls.

Why do they need a downside? It can be argued that you have an advantage against someone if you're wearing the science goggles or sunglasses, and they don't have any downsides. Literally mesons are used for basically nothing aside from very specific scenarios which Vitatroll outlined, and if you throw a huge shit on them no one is going to want to use them anyways.