I'm not seeing it. This is not a 'new battle system'. It's the same system with auto attack. From the video it basically looks like your tp meter now takes the place of the stamina bar, you get more constant damage, but there is no interruption (except from lag) to normal abilities.
The battle system was broken. I agree with you there, but auto attack does not fix it. There is nothing dynamic about replacing an attack with another attack when the only difference is pressing a button.
I'm going to respectfully disagree with you here. You make a good point, but I think if you think the core battle system is "broken", then maybe the game just isn't for you. Adding Auto-attack allows players to focus more on communicating and using abilities rather than dedicating time to picking "attack" to build tp. This simple change alone means 2 major things:
1. Battle Regimens will be infinitely easier to execute, meaning that if these get tweaked / playerbase adopts them in group settings, it adds a whole new element to the game. Think about all those behests you do with spam killing...if they change things like they've said they are (re-evaluate damage formulas, increase mob defense, etc), teamwork in behests will be crucial.
2. Every class can focus exclusively on what abilities they want to execute. Mages will cast more magic. Gladiators will be better at using hate control and defensive abilities. Other classes will also benefit from this.
One caveat: Does this fix some of the latency issues and other "bugs"? Nope. But adding auto-attack does change the game beyond just spamming an attack button over and over in more ways than one. Side Note: Anyone else notice the new BG music in La noscea? I wonder if thats a change coming soon too.