LG... re kerning, I agree... but I've got to assume that they tested, reviewed, and are testing some more, and may have other objectives that are clouding this issue. Back when corporate style guides were printed on paper, I saw the style guide for Coca-Cola, and it was a huge volume with newspaper-sized pages. They had logos plotted out for every variation from business card to letterhead to bottle to can to bill-board. Different kerning, thicks and thins, and sometimes letter shapes as well.
Some small ad agencies I've worked with, which are run by good designers, do the same thing on a smaller scale for their clients. So this isn't just a mega-company thing. Even I... with MS Word or Photoshop... spend time kerning for various business forms, DVD labels, etc.
Regarding red next to yellow, that's a tough one. I tend to agree that the current kerning is currently too tight, but there may be other issues.
It's interesting to compare the kerning on two examples you can view right now in different tabs and switch back and forth...
Alphabet... [
abc.xyz...]
- grey and white, used in text rather than as a logo, and smaller than the main Google search logo, and larger than the logo on upper left in serps pages. This "Google" has more space between letters than either of these full color logos. Because this is mono-tone, you can't test your theory about whether this would fix the optical illusions seen in the color logos, but I'm thinking it might.
Google... [
google.com...]
- as noted above, both the front page and the serps page are more tightly spaced than the text on Alphabet. Perhaps these are tighter because they're logos and Google designers (or their bosses) feel that logos should be more tightly spaced than words in text.