This is a large rearchitecture. The reason it has taken this long is simply because of how comprehensive it is.
Of the four O&O chains, CBS has the most problems ailing its. Most of the stations are ratings fixer-uppers and have spent two decades or more in such a condition. There was no news in Detroit. Post-Dunn and Friend, something radical needed to be done. And the investment in News and the fact that there is actual innovation and renewal in News are all to be hailed.
If you watched the first night of the new Evening News look, you might have noticed the text elements listing places where CBS News has bureaus. There's London...Rome...Johannesburg...Atlanta...oh yeah, and Sacramento and Baltimore. News and Stations in a nutshell.
There is a lot going on. A visual overhaul, the first top-to-bottom one at Stations in nearly a decade; a restructuring internally; the continued effects of the Paramount Global merger, etc.; the launch of news in Detroit; and the shift to a streaming-first or -co-first mentality at every outpost in Stations. This does not happen overnight.
Why are we so excited? Because there is a sense of renewal at CBS that is long-deserved and needed. Because they are fixing, finally on a comprehensive level, a historic inequity in Detroit, and they are making the right moves in doing it. Because there is a pathbreaking branding approach.
ABC has too many successful news franchises in its markets to do this. NBC has too many, and it also has Telemundo; it's hard to have that sort of fusion of national and local news when there are two separate networks (with separate teams) to feed and all of the NBC newsrooms it runs are bilingual. Fox fundamentally cannot do this without compromising and tainting its local news product to a significant portion of the audience.