If we look at the fundamentals: player fitness, injuries, respect of anti infection guidelines [aside from Hertha - again], then I would say the relaunch was a success - assuming we don't get wave of positive Corona tests now of course.
The football is not as straight forward to judge. I think Dortmund and Gladbach were very crisp and looked very close to their usual form, Bayern too played with their usual dominance and confidence, but their game was more grind than spectacle, though the same could be said about their last match before the break. Cologne vs Mainz was also a match that was fairly entertaining and seemed fairly unaffected by the break.
I suspect we could see a teams who rely on athleticism and pressing suffer, because some of their success relied on creating a hectic atmosphere and using it to force out mistakes to capitalize on. As well of course as crowds helping them maintain their energy. On the other hand superior sides and technical players may find it easier, since everything is quiet and there are no fans to sigh when they pass backwards/sideways or when they try a more ambitious piece of footwork that doesn't pan out. I haven't verified this via statistics, but I also assume that fitness isn't yet at a level where the weaker teams can press relentlessly for most of the game.
The derby was a fairly good example of this. Schalke usually manage to close the gap in quality with aggression in these, as Dortmund struggle for composure and concentration. However this time around Schalke were their usual miserable self and Dortmund took them apart with clinical precision.
I think the form table is also worth a look to see the effect of Corona on the football [keep in mind: Leverkusen and Bremen have not played post break yet]:
With the exception of Hertha all teams which won/lost their games were also in good/bad shape results-wise before the break. Leipzig, too saw their form dip before the break.
The Bundesliga games were pretty terrible. As soon as a team no longer has anything to play for they will switch off. Not even a crowd to fire them up and a lot of players probably ok with being left on the bench.
You're making a pretty broad point, but what games are you actually talking about? Frankfurt scored a goal when they were down 0-3 and kept trying, Schalke conceded an easy counter attack, because they kept pushing forward players when 0-2 down, Mainz actually turned a 0-2 into a draw.
I think a lot of people have unrealistic expectations, like comparing a highlight reel with an actual match. It's fairly normal for teams to accept defeat at some point and conserve some energy or protect their goal difference. E.g. Union Berlin being down 0-2 minute 80 against an in-control Bayern side, or Schalke when they haven't created an ounce of pressure all game and find themselves down three goals in Dortmund.
I can understand when people say that football isn't the same for them without the crowd noises, that they can't get immersed into the matches (maybe some international broadcasters will try the feed with mixed in fans - it got a positive reception in Germany as far as I can tell), but when I read stuff like "the football is so shit, LOL" I really wonder if people are actually capable of making the comparison between Cologne vs Mainz and your average Burnley vs Brighton match, which would be their PL counterparts.