My opinions to your points below;
- Augsburg impress me with their signings.
- I thought BVB had a very strong first 2-3 days of signings in getting Brandt, Schultz, and Hazard. Haven't done too much since, aside adding some veteran experience in Hummels. Hummels I think has another 1-2 good years left in him, so big signing for them. Don't want another collapse I already miss Hummels, but I'm happy he's going somewhere he can get bountiful minutes barring injury.
- Hoffenheim look like they're gonna drown this season
- Loss of their brilliant HC and most of their premier players over the past 2-3 years, I fully agree.
- The three promoted sides look like they mean business.
- Köln I presume will stay up. I want Union Berlin to stay up, as I love their story but I'm not sure how their team will handle the BuLi. Paderborn I think may get relegated.
- Bayern...? okay then...?
- Window isn't done, but right now we didn't do enough to strengthen our attack, namely wings (Sane transfer appears to be happening even with the injury in Community shield? Ziyech also rumored to be a signing). Hernandez and Pavard are great defensive depth signings, being as they can cover numerous spots. I think Hernandez is starting once his knee is fully ready, and Pavard is going to be a backup or sub for Kimmich. Possible signing of Roca would be good midfield depth/starter. A LOT of "ifs" though for Bayern.
You can't be serious in thinking Leverkusen is going to finish above Bayern. Kai Havertz is a machine but losing Brandt is going to hurt them, big addition to BVB though. I think this may be the year BVB finishes ahead of Bayern due to the exodus of Hummels, Robben, and Ribery. Players who were the face of Bayern for essentially the past decade (Hummels less so, only here a few years). Coman and Serge are really good albeit injury prone, and we lost a few younger kids to other clubs. Still some time in the window to bring in players, but right now I don't think Bayern could win the BuLi, it would be BVB's title to lose if no further signings are made (written 8/4 at 9AM).
Here's my predictions;
1. Dortmund
2. Bayern
3. Leipzig
4. Bremen
5. Leverkusen
6. Augsburg
7. Wolfsburg
8. Köln
9. Hertha Berlin
10. Monchengladbach
11. Schalke
12. Frankfurt (loss of Jovic & Haller hurts)
13. Düsseldorf
14. Hoffenheim
15. Freiburg
16. Union Berlin
17. Mainz
18. Paderborn
Bremen is essentially mimicking Frankfurt from 2 years ago, making a decent run in the cup and in the League, then tired the next season, as you noted as well. I hope Sargent can get and cement his place as a striker for them.