I agree to an extent, but the Old Oak Common Name won't be meaningless to many people who worked on or used HSTs. I definitely agree that the IET name can be confusing, seeing as some people think it's actually an IEP because of the Intercity Express Programme.
Whilst Gary would be a fun name, it wouldn't have meaning unless your name is Gary. Most names are for marketing purposes.
Having said that, I doubt the 804s will have a name, they don't really need one as they are going to be working under a branded service of EMR Intercity, so why confuse things more?