LFR used to have mechanics in pandaria, that was an obvious 
show
raiding is in a good place.
all we need is to delete LFR and allow FLEX to go up to 40. And also flex the tank role, not jsut dps and healers.
You mentioned Raiding not changing much since WoD which is a key point in the life cycle of this game that 0 years you mention Marks a Dark day for this game, That was the day it changed hands from a ver competetent Development Team to a Team who systematically has well made the game how it currently is. G Rated Numb content Numb progression etc.
I would go deeper but I have posts reported by fan boys of this current Development team which in all honesty is the playerbase we as a community never had nor want but is being pandered too because that new community of people who have no concept of money and this is what Blizzard is supporting. And the game has suffered for it and I have been playing for over 12 years. The BFA Nerf to the game which currently isnt fully rectified btw is where I believe the initial Problems Start. It was not Warlord’s Of Draenor being bad but being gutted of any content near the mid to end part which soured the community back then.
If Blizzard want to do things and do them right they need to not listen and go with what the wider community want not do things they deem suitable for us because that has not worked sinceWarlord’s and will continue not to work for anyone but a small minority of people which are mainly under 12 hours of play a week casuals. Those like me who have a dedication to the game regardless of what that is are still active and we Endure what we are handed by blizzard but we all yearn for the good old days where actually playing the game was a challenge. You did not get easily rewarded just because you showed up, You actually had to work for you gear whether that was PvP Dungeon grinding to get into Raids and eventually Raiding, We did not have a fountain of endless loot most of which we don’t even need after a couple of weeks but we still get it. We never had mindless events such as the Theater that lags out a whole zone or like in Dragonflight roughly 10 or more hourly or every hour and a half events to do which gave lfr or nromal to heroic quality gear once you used the crucible to make it Set gear.
The game has become more like a Mobile Phone game in the last 10 years then an actual WoW experience, I will endeavour to perservere because I am not only Dedicated to my WoW characters/Account but I don’t have another game lined up that I want to play since most modern games these days are beatable within a day or less and are quite frankly more Boing than anything WoW has to offer me. If there was a better experience out there regardless of game genre I would be there and not here,
I will end on saying this. If you enjoy WoW in its current format play as little as 1 hour a week that is 100% fine by me I do not judge the Community as a whole more So Blizzard when it comes to content or lack there of. I am just glad I get to Play a game that literally has endless ways of being played. And I respect how people play the game the way they do but I long for something more than a quick Dopamine fix while waiting for the next that is not fun that is how Mobile Phones work people waiting for that notification sound from someone on a post they made or a text reply sound etc. That is how I view the systems in wow currently.