In Grand Arena, there are very often opponents who do nothing until the very last moment and then simply try to score a little more than you with 2–3 attacks during the final 10 minutes of the phase, allowing them to take win without efforts. And this happens in the middle of the night, when I have already gone to bed long ago.
But if I attack during the day, the opponent then methodically makes sure that, no matter what, they overtake me by at least a small margin, because they know exactly how many points I have already scored.
It should be changed so that neither player knows how the opponent is attacking. That way, both players would either have to give their best every time, or if they don't want to play, then simply do nothing instead of exploiting the final minutes against someone.
Besides that, you would much more often get to see the full results of how well your defense performed, because if the opponent wants to win, they would always have to play at their full potential.
But Territory Wars are not relevant here, because they are fundamentally different from a one-on-one game mode.