Of course there is more to Om, than just what i picked and highlighted here. But i found this very succint and stuck in my head. Now take this thinking a bit forward, like other math equations or logical reasoning. If Om were to represent God, it then represents any God. So no matter what name we call that being, it could then be represented with this symbol Om. Or rather another way to look at it is, to say people have replaced the symbol Om with names. Names they like to hear, names they like to say, names they like to sing, names they like for what it means, or names they like because of what it represents and many other reasons.
For me such a name is Krishna. I have my own reasons to pick this name, the image, the characterisation, the teachings etc. But yet, to me, he is just a god, could be any god, or could be used to represent any other god, as all others being an avatar of him. So i have replaced Om, in my equation with Krishna. Right or wrong, it works for me.