So this is a public transport ticket for urban areas. It's a good idea to make them valid across regions. If they can make it work, that is. There is still the task to distribute revenue in some adequate way, and currently politicians like to in indulge in wishful thinking and disconnect from reality in Germany, so let's wait if anyone has bothered to solve the hidden problems behind this. Could play out like the disastrous Energiewende (energy turnaround), which made people wonder if they have heating in winter. It's probably not as impossible as a full socialist central planning economy, but it's the same spirit.
In most of Germany urban areas and metropolitan cities are just a 30-45min train ride away. At the normal ticket pricing you will pay 32 euros for the roundtrip. Now you pay 49 for the whole month. It's a game changer for a lot of people living in rural areas despite everyone without any knowledge living in those areas arguing against it but it's Germany of course everyone and their mom will argue against it with arguments that have no meaning for the people it really effects.
And most people do live in the cities and don't do such round trips too often.
And many people doing a lot of city jumping fall into a more high income area and use IC/ICE trains not covered by the ticket (faster, and more convenient).
And that is grate! Because it part of what enabled the push for such a ticket.
Now we get a ticket which mostly is just about having a 49€ ticket for you local public transportation, while also having the convenience of not having to bother when taking some week end trips to close by lakes or similar, while being a big benefit for the people living in the "countryside" which is overdue IMHO, while also giving people more options to live outside/close by a city which can take a bit pressure from the housing market. And to top it off it makes it easier to sell it to better earning car focused people hopefully helping with a shift away from people owning/using cars all the time.
i don't think revenue distribution is a problem. most goes to DB anyways, and each region has local tickets that are valid across multiple companies, and they already worked out the distribution, so now they just need to extend the same process to the whole country.