So as mentioned, people are saying the reason Bryan-Omega went first was to eliminate as many commercials as possible, since there usually aren't many in the first 30 minutes. That is an unfortunate thing that really can't be helped, because the show would have flowed better with that being the main. It was a tradeoff between that and presenting the match in as pristine a manner as possible. This was not like All Out, which was a big UFC style card, with every match being massive. This was more like a massive boxing card, with one marquee match and other special attractions. Or maybe just a Conor McGregor UFC card then. In a way, it was cool in a SNME way, seeing the big match first. But a modern 2 hour episode of wrestling TV flows better with the main last, especially given the much higher in-ring standards for wrestling TV today.