Obviously by the number below my name, I love collecting achievements. You can imagine how elated I was when you announced account-wide achievements.
Now that the patch has gone live, my really big problem with it all is that achievements you earned on other characters still show up when you filter "Incomplete". For me, this really ruins the whole cross-character play-whatever-you-like type of mentality. When your mindset is 'clear the list of achievements' (while having it filtered on Incomplete), this is not possible unless you continue to do it on a singular character (and the specific achievement is not account-wide). I still feel restricted to earning achievements on my Shaman; and furthermore I feel restricted to continuing to play the same toon - because the achievements are being shown that they aren't earned by that character.
So yes, the number shows that you have said achievement. The frame is a different color. But the filter is still telling me that I don't have it.
I understand that Blizzard wants to preserve the ability to track achievements per character. That's amazing. I'm all for having that option, and I'm sure there are several people (myself included) that appreciate that option. But I'd also like the option to turn that off - at least at the personal level. Give others the ability to see you didn't get it on that toon (such as raid achievements, PvP, whatever). I'm fine with all that.
You could make a "Character" filter option. This will only show the achievements that the specific character has completed and has yet to complete. Basically, it's the old version. It seems as if all the data and framework is still there (because it shows Achievement earned by XXXXXXX and NOT [primary character name]) to make that happen. And revert the "Incomplete" filter option to only show achievements you don't have account-wide.
There are other obvious solutions and implementations of that idea, but this I feel was both the easiest to implement and the most efficient. You could give an option in Interface to "Show Achievements as Account-wide" or on the Achievement Pane somewhere (similar to how there's a box on your map to show Archaeology dig sites). Something along those lines. You could fix it to where filtering "Incomplete" doesn't show completed achievements on other toons, but that removes the option to show which you'd need for that character without a lot of work hovering over achievements - and would likely make others unhappy.
For me, that solution will truly make achievements account-wide and not per-character. I also feel it works for everyone. There's nothing being "removed", and I doubt it would make anyone upset. The default filter system should be willing to count the achievement as "earned" without any drawbacks (even if it was earned on another toon, etc) if achievements are truly going to be account-wide. Right now, I don't think you've achieved that goal. Just my opinion.
TL;DR: The default filters for the Achievement UI should show Account-wide, with an option to show character only. Right now it feels very awkward, you're trying to show both with the same amount of filters. I don't believe it captures the essence of what you're trying to do with account-wide achievements.