“Someone should also complain about these daft OSIs.”
It’s not daft, it’s the Victoria-Elizabeth interchange – on the street because the cramped and over-crowded Oxford Circus couldn’t handle a behind-the-gateline interchange (which would have a lot more footfall than the unpublicised current one). Perhaps it would be better if it would just be to the Hanover Square entrance of Bond Street, but that would create other issues (what if that entrance is closed, confusion that it doesn’t work for the other entrance, etc) – and other than intra-station interchanges, there’s no OSIs specific to certain gatelines.
