Steve Jobs would be in charge of the development process right from the start, driving resources and making both big and small decisions. It would not run using this obviously makeshift M1 + R1 set of chips. He would have asked the silicon team to make a full blown single chip solution for higher efficiency.
If you read the accounts about Vision Pro development, Tim Cook is a hands off guy. He lets his team debate and make the decisions. Cook comes in very late in the dev process to sign off. Jobs knows what he wants with high detail. And he gets involved in the deep end.
Apple debated internally whether to have a pair of lightweight glasses with a wireless base station or a heavier all-in-one. But they made a late change to the latter, which is probably why we’re seeing this weird chip combo and poor battery life.