You use combos to initiate battles effects that block those powerful attacks hence why each element caused a different active effect adding a layer of strategy in what combos you chose to do, I have to agree with them on combat XBC2 is superior in that regard especially as unlike prior games the blade system in XBC was more build centric making allowing the party more customization for battle, gameplay wise I have to give it to the third game. World wise the other 2 games are superior with X being top while story wise the first overall is better for slightly more consistency but XBC2 does a better job in developing the characters which really comes into play in the second half of the game and the DLC.
Future Connected is said to make changes to combat, either way all of this is good for the next installments of the series as it has three variants of the approach to change things up with.