They never made it to me during my Dwarf campaign. The End Times came and went without my dwarves fighting a single battle against Chaos. That said, I was impressed with the diplomacy AI during the End Times scenario. Every faction suddenly wanted to go full military alliance with my dwarves.
Same. My game feels a bit weird as Dwarves on Normal.
By turn 30, I think I had wiped out the Greenskins entirely.
Next 20 turns or so consisted of razing the border princes completely, and getting all eastern dwarves into confederation. Then, without ever fighting them in a battle, the main vampire group asked to be my vassals.
I then spent another 20 turns or so dealing with a random norse invasion to the south, and razing a few of the more truculent human factions in the middle of the map, while having the empire ally with me.
Then Chaos invaded, and for lack of any other pressing enemies, I headed north to see what was going on, got tired of dealing with Vampire attrition, killed them off, then fought one dragon ogre, and the Chaos leader. They never came anywhere near my territory thanks to all of the Human buffers, though at this point, the only thing touching my borders that isn't a smoking crater is Kislev.
After Chaos went away, all I needed to do to win was take over the 2-3 dwarven groups near the center of the map, but they refused to join, so I've gone to war with them. Ironically, this hot dwarf on dwarf action has pissed empire off enough to declare war on me. This is okay, because I was using my two legendary leaders to clear the dwarves, and had another 7 or so armies sitting around with their thumb's up their asses, not to mention about 15K gold income a turn, and a reserve of around 200K right now cause I got bored upgrading stuff that was never going to matter. It also gives me something to start sabotaging with the 5 or so thane/runesmiths that I stuck in a pile so I could ignore them more effectively.
So that's where I'm at around turn 110. I need to take 2 dwarven settlements(which I can already see are undefended aside from garrisons), and then rampage through the empire until a fucking master engineer reaches level 15.