Here are some things you can completely forget about then.
The damage reflect feature of Gold Experience. Its never used after Giorno's fight with Koichi.
The 'hyper mode' from GE's punches. Its only used against Bruno.
The rules as to how much control Giorno has over newly created animals keeps changing.
Matter of fact, what he can turn into what also changes.
Its never explained in the show how Giorno gets that picture of DIO.
Giorno is never once referred to as JoJo or GioGio.