Cool this was bothering me when I was playing a few days ago. I'm glad they fixed it .

Also OP, not to insult you're intelligence but i'm sure they did not stop the battle program team, music team, the motion capture actors, sales team, localization team, debuggers, environmental effect programmers, classes designers, story line team, engine designers, battle animators, weapon designers, and etc just to implement this.

Ill bet that it was a guy who knows how to use a tablet and Photoshop and drew some arrows to make make the action bar stick out more. Then he spoke to the UI programmers and they replaced the current highlighter with the new arrows. Then the QA or maybe the programmers tested the to see if it works. Ill bet that this took no more than two days to complete and it was done by a very small group of people. I doubt this completely halted the dev team.

I'm no game designer btw so maybe i'm wrong.