I don't really think you can draw any conclusions from that. It just illustrates that the enemies are targeting the first character they see. There is nothing in the article which even hints at environments being particularly important, and storyboards are just storyboards.
If you follow the annotated text, the purpose of the storyboard is to show how the "pointer" and "gathering" systems work. What is being illustrated and explained in the text is that the game's core system in battles is who the enemies are focused on, and that they clearly have priorities in terms of targeting. The player can also see who the enemies are targeting via pointer lines, similar to FFXII. This allows the player to make strategic decisions in redirecting the focus of the enemies with a skill called "gathering".
That's really all that can be and should be understood by this entry. There is nothing mentioned about whether the battles are going to be in phases, whether it is entirely realtime or partially turn based, or whether attacks are decided from a menu or if it's an action RPG. There is also nothing to indicate there is actual line of sight or environmental interactivity in battles.
I'm not saying there isn't, but I'm saying assuming such will likely lead to future disappointment. It is amazing how we are actually even discussing the battle system without having seen a single screenshot from the game. The marketing in this game is amazing.
Like I said before, the blue lines are NOT "line of sight". They are visible lines showing who the enemies are targeting in a battle. They will be visible in the game itself too. They're called "pointers".