I can use Beast Lore on BEASTS and everything shows, it is meant to be restricted that way.
What people fails to realize is the core has been updated since last April. A lot of people are misinformed or forgot how it was on Nost, they specially forgot how it was on retail vanilla, Nost was not as blizzlike as poeple think. Many of the same bugs and band aids can be found on both Nost and Elysium.
-Stiches wasn't even blizzlike on Nost and was very buggy so I'm not surprised to see him disabled, sometimes it's better to disable something than endure a buggy state, until it's fixed and actually blizzlike. FYI, on retail vanilla there was only 1 stiches and his pathing was STV entrance (iirc) to Darkshire. On Nost there was 3 stiches and they were often found spawning in Raven Hill.
-Mobs chasing you 3 times longer was also there on Nost but it does look worst here (that bug is so annoying that I feel it is worst here but I could be wrong).
-Mobs showing HP was never a thing at all, you have to use an addon that will CALCULATE target HP based on damage done and how fast the health bar drops, exact health couldnt be determined unless you use Beast Lore ability.
-Player life is only visible with addons, I use CTMOD and I can see my HP (without having to highlight mouse cursor on the health bar), party HP and Pet HP. Refer to previous point for target HP.
So please, stop spreading misinformation, specially if you never played retail WoW vanilla back in the days. And also stop using buggy addons not build for WoW 1.12, test CORRECTLY before calling out buggy, not blizzlike or not like it was on nost.