I've been looking forward to the next episode for over 20 years. "What are you talking about?"
In 1999, when DS9 ended, I thought the political situation of the Alpha Quadrant in the 24th Century developed over the course of TNG and DS9 had run its course. It felt like there was a beginning, middle, and end. I thought that once VOY was finished, Star Trek should move into a different century so they could shake things up the same way it was shaken up in 1987. (EDIT: Obviously Picard has shown there's more story to tell in the late-24th and early-25th Century, but we're taking about what I thought back in '99.)
Then, in 2001, they did change the century but I thought -- at the time -- that they went in the wrong direction. I wasn't too thrilled with the idea of a prequel in the 22nd Century. I wanted to go forward. But, at the same time I didn't want more of the 24th Century. So, in my mind, something would probably happen to change things up to make it different. I didn't necessarily think "The Fall of the Federation", just something that would differentiate two time periods.
TOS was my favorite Star Trek series and I happen to like the 23rd Century, so I was okay with DSC taking place there. "Better that, than the 24th Century," I thought. But now that DSC has moved to the 32nd Century, and it's clearly not an extension of the 24th Century, it's what I wanted in the first place, after TNG/DS9/VOY.
So this next episode, Discovery reunites with Burnham and different Starfleet people (or what's left of Starfleet) are coming onto Discovery. And the ship is going to become part of the 32nd Century world, instead of strangers. Discovery will be fully in this new "world" and we'll be seeing a lot more of it. And we're learning about The Future from the point of view of a 23rd Century crew. The timeframe of Star Trek that I identified with. So that makes it the perfect combination for me.
Another good combination is that "The Fall of the Federation" isn't completely "The Fall of the Federation." It looks more like it's just down but not out.