Ehh. Meanwhile Heroic dungeons have become heavily pushed again as a core progress point as of S4, so I’d say they actually are pushing the queue as a feature you’re expected to be using more frequently now.
The problem with LFR is that even a modicum of difficulty becomes a big problem if (as is common) you have a limited segment of the group that’s actually trying, and also if the boss has core mechanics that can’t easily be defanged to the point of addressing that without basically not being a fight at all (say, N’Zoth, or a lot of the Shadowlands raid bosses).
Add to that how restrictive WoW is on battle rezzing (compare its closest analogue, Alliance Raids from FFXIV, which are usually similar to or even a little more complex than LFR mechanics wise, but rez is also orders of magnitude more accessible since except for a DPS debuff - which is usually not important, as DPS checks in Alliance Raids are normally more “are enough people alive and at least targeting the boss and pushing some buttons?” checks than real challenges - and cast time/mana cost, there’s basically no limit to battle rezzing there) and you can see a problem looming.
The result is that the common MMO latecomer/slow paced player scenario (and these days, “slow paced” can culturally almost even go as far as “didn’t make a point to bum rush everything by lunch on patch day” in many a situation) extends all the way down to LFR in WoW raiding.
And that scenario rightly turns people off to the game. Why continue putting in effort if it feels like it won’t matter? No matter how gud you git, actually getting anywhere means hoping you find n-1 other players that can also cut the mustard, in a culture where those players tend to be in an increasing rush to close the wagons around them in order to avoid failures caused by unskilled teammates, and are only too happy to just tell folks sorry you missed the bus try again next season …
Which means Blizzard has to try something different. This is something different (and which usually is successful when tried by other publishers).
And come to think of it, is it really that much different from say how Torghast worked? Even if you got in late to the party and missed out on the rush of group runs, you still had the option of soloing it, so you weren’t either locked out of your legendary or forced to try and get a carry (like happens with so much other content). Or you could easily ask your guild for help without needing a full squad’s worth to be available (the amount of other people’s time needed to catch up one new player, or even one new character, has been a chronic thorn in WoW’s side. Remember that BRD escort quest? xD).