The Battlefield 4 Community Test Environment has been updated with the promised HUD Opacity system, and below you will find a video detailing some of the improvements.
The HUD Clutter fix will be deployed soon into BF4 Vanilla, according to YouTuber and Battlefield commentator Westie. Most of these changes will also be implemented into Battlefield Hardline.
Hopefully once the changes are applied, the heads-up display of the game will no longer get in the way of you shooting people.
The full list of changes coming to the game are listed in the link at the top of the article.