I mean, most of the recent changes are based on bug reports which use 3.4.3 as evidence. toc togc sharing an id is the most obvious example. How will onyxia progress look once they reach toc and they can only kill 5 bosses per week, and cannot get their 2 bis trinkets, as entering hc locks them out of going normal, unless they abandon their hc group after having that gear to then go into a different group that does normal? this seems like such a bad design choice, which is clearly copied from modern blizzard.
the deep wounds tooltip states that any crits trigger it, it was always triggered by any crits. people have used oils of immolation since many years, many people even reported it and it wasn't changed because it's was according to 3.3.5. Other people reported it not being as good as in modern blizzard because of crit munching, and that got dismissed too. it's only now after years where it's seen as a bug by the staff, and the bug report literally quotes modern blizzard again.
As I wrote in that bug report already : I do not mind this being changed from the original 3.3.5 for balance reasons, but balance reasons being ignored on other changes is frustrating.
how is me going and reporting deep wounds not being triggered by spell crits, while this did happen in 3.3.5 different from someone else reporting that omen of clarity proccs more than 3.3.5? either both reports should be dismissed or both followed through. what is or isnt a bug is subjective, while game balance is more easy to judge objectively, considering the immense amounts of data which was collected from a decade of people trying to get the maximum out of their speccs.
maybe you also underestimate how many people on your servers play for logs. either to compete for higher positions or just to compete against their old self and track progress. any change to their class, but especially nerfs, make this completely impossible, as a 5-10% nerf is having a bigger effect than a year of improving gameplay after you have reached a high level. I think that changes which affect the power of a specc directly should be treated with great care at this point and only be done if deemed absolutely necessary (most likely what the deep wounds changed was deemed as) but absolutely not the case for the recent changes to demo warlock, rogue and boomie, which killed the will to play these speccs competitively for their biggest lovers. Bug fixes or not, those changes alienate a huge part of the player base whenever they happen, and that can hardly be a good thing.
similar logics apply to bosses getting nerfed. for example the sindragosa enrage timer got extended by several minutes, completely trivializing the fight for groups which just stack 8-9 healers now. that might technically be a "bug fix" if the timer was that long, but it was not shorter the past 10 years by accident, was it? early developers decided to go against 3.3.5 and put it to a challenging timer to make the fight more fun. why change this now?
it sadly feels like more and more things which made warmane superior get changed