It just means that ES won't be a guaranteed hit anymore but will instead have the same AR/def/lvl calculation as most other weapon attacks.
So basically, ES locks are gonna want to get at least some decent amount of AR now, bringing their gear needs a bit more in line with other weapon attacks. Nothing too dramatic, just warrants a difference in gear choice and ends up at least a slight nerf overall as you'll not be getting back to a full 100% hit chance (95 at best).
The "everything is trash and ass now!" fears are quite overblown when you look at it objectively. At least based on those patch notes. Nothing in there kills any lock build. Not even close. It merely brings some of them at least a little more in line.
Schnorki
4900Moderator