Lego also stands for something plural. That's how it has always been used, and hearing/reading it the other way is just as jarring as talk of sheeps or rices would be. Please stop.
It jumps out at me, the same consistent misspellings or grammar errors do. Os I wouldn't say I struggle with them, but they are certainly an annoying distraction.
We're already diverging from the official version, so I don't think one could be more correct than the other. This is like arguing over whether "octopuses" or "octopi" is correct when the etymologically correct form is "octopodes." Only pedants and etymologists worry about it.