The only major change for users is the new ability to change your notification settings if a user does not want to receive "Asker/myTake owner upvoted" notifications. If you go to your settings page and look under the "Privacy" box, you should see the "Notifications" box and if you uncheck that and click "save" then users will no longer receive notifications for up votes :)
Also, it seems to me that the "Asker upvoted this" text is now a tiny icon to the left of the opinion... or at least it certainly is that way on myTakes.
I personally am not fond of the idea because for me that icon is barely visible (in fact, on the inverted color scheme, it is completely invisible), so I made a small JS change on my side that puts a δ sign there if it's upvoted.
Yeah, I have no idea what I'm doin'. I'm not a JS guru, haha.