With the release of Ruby Sanctum in Frostmourne RS was buffed too in Lordaeron, for no better reason that they share the same core, and so far it has been a complete disaster to the realm.
-Halion-
Old Lordaeron 25 nm: 40M
Old Lordaeron 25 hc: 58.5M
Enrage: 8 minutes
Lordaeron 25 nm: 44.5M (Retail 43.5M)
Lordaeron 25 hc: 64.5M (Retail 58.5M)
Enrage: 8 minutes
Both modes received a 10% increase in HP, Boss hits harder now and Living Inferno got a 30% HP increase, from 1M to 1.3M. In normal mode the buff is excusable, since it was lower than it was on retail, and the reason it was done even by 5.3~ average groups, now it requires solid tanks and higher gs or semi g-runs to pug it.
But in HC it makes no sense, it got a 6 million hp increase to a boss that was already so difficult only a handful of guilds could do it before. Imagine if Fester HC got a 6 million hp increase from 57 million to 63 million, or Rotface from 61.5 million to 67.5 million, or Sindy HC, PP HC, LOD. It adds a huge difficulty spike no only for boss, but for guilds and general progression. Basically it has created a rift; guys who were lucky and farmed it before the buff are the ones who can kill it now, people who were progressing it no longer can, people that were about to start progressing it have to postponed indefinitely.
There are no ICC pugs now, few VoAs and now only few RS pugs, which mostly end in failure. Even on reset days raids are not longer being made, only a couple of guilds can access the HC content and all the other guilds are dissolving. Making all the buffs done to Frostmourne sharable with Lordaeron has been a complete disaster, in Frostmourne it doesn't matter since they have double raid loot from timewalking and the ICC Buff to cheese content and it gets wiped every year, but on Lordaeron all those buffs stay and there's now way for people to combat it, since items are the same and there is no ICC Buff. I would suggest to make any buff done to Frostmourne stay in Frostmourne, it's an entire other realm I don't see why it has to affect Lordaeron. You are deceiving your costumers by making Lordaeron a progressive realm too, it's getting constantly buffed along with Frostmourne; or at least add in the realm description it has lower SFS drops, lower trinket drops, and it is progressively being buffed every couple of months otherwise costumers are joining a realm different from what they are being offered / expect.

