I wasn't there, what did they tone down to make easier?
Pretty much any damaging ability that was challenging. Mostly on group mobs in the "dungeons", but some overland mobs as well.
On group mobs (currently chevron mobs), the level 5 skeletons used to Bone Spike, which would kill your tank if he didn't shield against it. It now takes like 25-40% health and you can ignore shielding it. Disease Cloud on the caster version of those same skellies would AoE wipe the group if you didn't have someone silencing/interrupting or curing disease. Now, it's negligible damage and nobody cares if it is cast.
The level 8-10 Goblin Group mobs in the first "dungeon" (Goblin Caves outside Thronefast, which is a massive area) had pretty much every single ability tuned down drastically. The Geomancers used to be able to AoE wipe the group with their fire AoEs if you they weren't interrupted. It was a fairly long cast though. Now, they just do moderate damage, no need to try and interrupt. The Goblin Savages used to do a 6 second wind up ability that would wipe the group if it wasn't interrupted. The Goblin Ritualists (Shaman), would kill you in seconds with their poison DoT if you didn't have remove poison, and they could almost complete heal if you let them cast their HoT on themselves. Both of those have been dumbed down to where it's minor annoyances. You still want to interrupt the heal though as it extends fights. The warrior goblins, still in the cave, had an ability named Pressure Plate (which is still in the game), that basically was a casted damage reflect. This one ability made discord cry for months about how hard it was. Because if they got the cast off uninterrupted, it would reflect any DoTs currently on the mob as well as any damage taken for the next 10-15 seconds. You had to turn attack off if you didn't block the ability from going off. Wizards kept killing themselves in one shot, and Shaman were getting eaten up by their DoTs. The damage reflect was probably 100-200%. It's now like 5-10%. You just ignore it completely and keep fighting.
In the overland, the Lost Orc would drop a bomb on the ground that would explode and kill the entire group. You had to watch for it and simply drag the mob away. Very similar to the dwarves in Gnomeregan in WoW. That got removed.
The Bears would Maul. If you didn't shield the Maul, you would die from a crit. If the healer didn't have a heal dropping as the Maul hit, you'd die from the follow up attacks. It was easy if you paid attention. The Deers would "Buck", this was a massive melee haste for 10 seconds. You had to shield or heal through that or the tank would die. If you let them get the ability off. That particular ability may have been uninterruptable though. But it made you pay attention as a team. Both of those abilities have been removed/or made negligible.
I can't express enough how many people cried on the Discord about how the game was too hard. And it was shocking to see that some of the most hardcore players, at least in terms of time spent playing the game and leveling, were the loudest. It was sad. And Joppa continually kept dumbing down the game. And the saddest part was that a lot of the people/groups complaining weren't running a two healer comp. I always had a Shaman/Cleric combo in my group, we never had any problems. You just had to pay attention. And we always did the hardest content available. The groups that were geared for more DPS to level faster should have had a harder time with the more damaging content because they chose to forego the second healer to try and speed up leveling. The game was great, it was hard, it was rewarding in the sense that it actually rewarded the groups that paid attention and had high individual skill caps with their class mechanics.
Right now, all of that is gone and removed. Maybe it got pushed to higher levels. But the 1-20 game is insanely easy now. They have ONE ability left (Waylay) that requires you to actually shield/heal through it, and you're seeing people complain about that being too hard and it needs to come out. It's fucking embarrassing as a fellow gamer, who is an old fart, to watch people continually demand the easiest/simplest approach to leveling/obtaining rewards. And it's sad that Joppa listens as much as he does. The game is still good, it used to be better. At least in terms of combat. The rest of the game has come a long way and is definitely much better.