The ST09 battles are part of a larger trend towards a kind of stylized realism (I know it sounds contradictory, but it is Hollywood). People complained about the fight scenes in Batman Begins, the Bourne movies and in a bunch of other films. It goes back as far as Saving Pvt. Ryan, where people complained they had trouble following the action during the landing at Normandy (unfavourably comparing it to The Longest Day).
The fact that such fights and battle scenes are difficult to follow is precisely the point. Real life conflict is chaotic and disorienting. It wasn't until the past two decades or so that filmmaking technology could convey that sense of chaos. Fights and battles were highly staged because that's what technology allowed for. And like all changes in aesthetic standards, there will always be resistance from some and admiration from others. Staged battles and fights were once a requirement. Now they are a stylistic choice. I expect they will return (some filmmakers never abandoned them) in greater numbers but the more frenetic style is here to stay.