Yeah, Maruoka looked pretty good. Just some good physical preparation and experience and he could be a useful option for the first team in the future. Plus no new injuries today so those are about the only two positives to take out of this poor performance.
It's the same as usual. When Bayern gets just one point, opponents get 0. With winning the home matches and not losing away Bayern will easily hold out until the winter-break and then the squad should be thicker and the players will also have regained some fitness that they lost this summer due to the WC and short preparation phase.
Well, Dortmund are in a similar situation. Reus, Gundogan, Subotic, Kehl, Sahin, Blaszcykowski, Kirch, and Ji were all unavailable today because of injury problems. That's 1/3rd of the entire first team squad and it's been like this for quite some time now, which probably says a lot about how these injuries may be linked with the wear and tear built up in the squad after years of playing under Klopp and his intense methods/gegenpressing football (most managers who apply similar pressurizing suffer these problems, LVG and your own Pep are other examples).
What upsets me the most about losing this game is that had BVB won, they'd have not only gone top of the league but they'd have done it at a time when all of the key players are returning from injury in the coming. Imagine being top and having several quality players of that caliber return to the fold, it would have given the team plenty of confidence that they could seriously challenge this year and give Bayern a serious threat for once. But instead of taking advantage of their slip up with HSV, the team folded. Big time. And in the most frustrating way too if you look at that 10 minute spell Mainz scored twice in particular.
Of course a title challenge can still be formulated from here as it's early days still, but the team cannot throw away games like that and hope to win the league or any major title for that matter. Look at your own Bayern, they played like crap today but they still got the draw. The old 'win at home, draw away' formula still works, especially in league campaigns where those extra points make the difference. If BVB couldn't win today they should have at least stayed solid enough for the draw, not go all out and risk losing it all. It was a naďve way to lose.
I still believe though that if BVB can overcome its injury woes and regain the fitness of the key players that they can challenge Bayern for the title, at least for a prolonged period. A near-full strength Dortmund is a different animal to take on, lest not forget.