Well they're not really HM in the way we're thinking.They're really story mode Primals, that jump straight to EM.
Well they're called hm, because they're 50 and stuff, I'm not really arguing that they're not hard even though they're called hard, that's translation stuff and pointless, they are extremely faceroll though. Maybe you're saying the storymode original primals were too, but only Ifrit really was. Titan has slain many people due to derpderp(I'd say it's Ramuh/Shiva hm difficulty maybe) and Garuda is potentially the hardest of the 3 modes in NM. The fact they're level locked and as such item synced to intended difficulty makes them a lot more challenging than Mog or Leviathan HM for example.
And it's fine really, they're storymode stuff, they shouldn't be too challenging, but I wish they kinda were a bit more challenging still. It's very anticlimatic to watch the Leviathan arc cutscenes and stuff, and then fight it and it's like, the fuck is this, the bosses in AV were like 10times harder, it's basically almost impossible to wipe on Levi HM unless you don't hit the switch in time, which is the really only thing that matters the entire fight.
On the other hand, Chrysallis might be a bit too challenging, for a story mode trial fight. While the first phase mechanics are fairly clear, the temporary phase 2 thing is extremely confusing and it takes a while to get back there. If you're told exactly how you should do it, it's not so bad, but unlike most other storymode stuff, figuring out on your own isn't nearly in the same ballpark, especially since a lot of the elements are basically red herrings which don't really matter.
I do hope they find a better middle ground in the expansion. If they're gonna go like this to be honest, they should just make the story fights solo instances so you don't have to wait a queue, and add some NPCs doing stuff. Hell that'd be probably more fun than doing your story later than the first 3days and having someone tell you exactly everything that's going to happen then yell at you if you don't do it right and/or quit forcing you to wait more or worse(if you're a DPS), requeue.