I am ok with the difficulty.
LH seems good across all 3 raids. I only ran LN on tempest spine shortman because guildies didn't want any lag. Haven't run LN shroud or Hound.
LE is tough as it should be - consider something other than one-shot mechanics for the next raid but it's fine for this one. I've seen several LE pug groups up on Sarlona but the timing didn't work for me so I couldn't join. I was invited to join a group doing all 3 raids LE but at the last minute it was cancelled due to concerns about lag. I don't mind failing on LE if we mess up but I don't want to fail due to lag esp after we already invested time into it.
I like the fixed # of runes in Hound and Tempest Spine better than the variable #.
The 2 LE quests are fine - they are solo-able so if that isn't what you intended amp up the difficulty in those quests a bit. HP are up but so is player power. Enemy damage is up but not so much that one-shotting is a problem.
I enjoyed both quests.
Only thing I will note is that evard's is not very effective in LE. When you adjusted saves and spell resistance down -it appears spells with saves based on stats rather than will/fort/reflex save stayed the same.
Also, if you want to put a lot of oozes and jelly in the quests that is fine, but it would be nice if you had more weapons in the game that were immune to the damage. I haven't seen epic everbright weapons drop in a long time. We could use a few legendary ooze/jelly beaters to try and find.