Anyone in the "things are too easy now" boat? I've been trying to drive dwarves insane by failing to provide for their needs
Hard to say with only one short-lived fort this far, and it had some personal mods in it (though none of them should be affecting stress, but can't say for certain).
I made an aboveground fort in an area with nearly constant rain and didn't bother to set up a temporary shelter. Dwarves were bothered by it, but the amount of stress (checked with manipulator) was closer to what previously "doesn't mind working outdoors" dwarves got. Didn't really need to do anything to get rid of the small amount they got from it. That seems to be a good change as rain was my biggest issue with the stress, but the fort didn't last long enough to see what long-term effects would've followed (I did get a couple of personality changes, but they were mild compared to before).
I had to really work to get my dwarves miserable and stressed out. In the first 1,5 years there was only a couple corpses lying around and it didn't take any time for most dwarves to not really care about anything anymore. Don't again know what long-term effects this would've had, but I certainly hope that dwarves will continue to get horrified and stressed by corpses. I've never had a problem with them going crazy because of corpses (except maybe the cases where a tooth/nose/whatever was stuck in a tree and kept stressing them for years until I accidentally found it) - I think it's one thing that makes DF dwarves different from the stereotypical fantasy dwarf.
I finally managed to get one dwarf stressed when I faced an undead siege, sent all my unarmed and untrained dwarves to slay them only to have all but that one dwarf killed. The survivor managed to crawl away from the carnage with the ability grasp and stand lost and, I assume, hid behind a wall. There he lay continuously harassed by two ghosts, being rained upon, starving and dehydrated. Only at this point the stress climbed over the limit where he started tantruming (and died soon after when the remaining siegers found him).
But yeah, first impressions from a short (modded) fort: rain is better now, stress barely needs managing and is (too?) easily decreased, and dwarves get awfully quick desensitized (which I personally don't think is a good change). But we'll see how my impressions change after a longer fort.