Your post is coming off a little combative. I am glad you like the changes. For me personally, I feel like part of the fun of games with multiple classes is you get a totally new gameplay experience picking another class. The changes in 7.2, to me, feel like they were specifically aimed at making BLM more like the other classes because its gameplay was too much of an outlier (they basically said as much when they explained why they did this).
For me personally I enjoyed the old BLM because I found myself totally bored playing the other classes and the game would start to feel like a chore for me. My personal experience was, I come from a background of playing other MMOs at a high level and I started playing FFXIV with a real life friend, and while I was part of their static that raided I was generally not in the same league as the other players (I was used to playing with much more hardcore players that would wipe very infrequently, in WoW anyway). The net result of this was, we would wipe on fights many many times and having raided before as Monk and BLM, and on Monk I was just so bored. On most fights I would literally press the exact same sequence of buttons at the exact same time, every wipe. Like at timestamp 2:36 into the fight I would use Demolish, every wipe, every time (this is just an example, not a real timestamp/statistics/etc). And there wasn't really any room for improvement, I was always doing the optimal button press sequence. On BLM I felt like I would learn from each wipe and figure out better ways to do things and it was fun to try different ways to approach the fight. This was fun for me, and if I was forced to play Monk I would not have enjoyed the game. This is just my personal experience. While I enjoyed playing at a high level and doing high damage, it was only because this was the only thing that was fun for me, especially in a static with real life friends that I did not fit in with, and kept wiping.