It's true the sim has been updated a lot since release. Dozens of World Updates plus Sim Updates, but that not necessarily means the sim is improving overall. Sometimes, there are two steps forward and two to three steps backwards, ups and downs. To me, the sim was "reset" to day one with SU5 last July, which brought Xbox to the game and needed a huge re-programming of the most part of the sim, as the size of the SU5 suggested.
Much has been said about the lack of a good update management policy and the quality of those. Hopefully it'll get better over time and changes are introduced in the way the title is managed mainly by MS (the boss).
I was really expecting that by this time of the year, after almost two after release, we would have a better sim with a working AI Traffic, ATC, weather system and default aircraft with more functionalities (like opening doors, for instance), but it looks we're not even close to that yet.
Just my opinion (and respect the others...).