So I just finished a keep run, here are the changes I noticed:

1.Almost all the mobs run a lot faster.
2.Gate on first boss requiring you to kill last group to open
3.More trash and pats, especially in the spots where people traditionally were safe before
4.Coffers dropped 2 lots of 7 allegan pieces, each worth 100
5.I pugged it, but got lucky with two pretty well geared dps, and I myself am an almost full darklight tank. It took us around 45min to clear with all the trash. There is a pack here and there that you might be able to skip, but you have to clear most of it.

All in all, glad I got my darklight already.