I don't know why most person be sounding really impressed by the Bayern Munich improvement in a way that sounds like they were never good or they were performing too poorly and so now they are doing much more better than ever, its really not that way because even before tuchel took over as the manger of the tea, they were doing quiet well until they had the tuchel era which didn't turn out nicely but regardless they did a little well only that they didn't win the league title then, so Kompany is actually doing a good job but he didn't come to meet a really terrible team so he had little work to do literally.
It's natural because going into the Tuchel era Bayern Munich lost their best ability to dominate the Bundesliga so people see something positive that they are back on track to win the title under Kompany. But actually this is not certain because Leverkusen themselves will also be fighting back to defend the Bundesliga title that they won last season so the competition for both teams will be much tougher. Now only four points away from Bayern Munich so there is still a good chance for Leverkusen to shift Bayern Munich's position but it really depends on the game that Kompany's team will show in the future.