According to anyone's roster, there are always opposing teams that you have ZERO chance of beating. For example, I have nothing at all capable of beating a Darth Revan team with Malak with a power over 110k(ish), even with a 105k DR-led team my best has great difficulty. There are other teams as well, of course, that I simply cannot beat unless much lower power than my teams. But as you all know, it's highly unlikely to be matched in a Grand Arena with 'much lower' powered teams.
My issue really lies with Grand Arena and losing battles stacking up. For example, I just led the best teams I had remaining against a Mother Talzin, Zombie, and Asaaj team 12 times. Yes, I just lost it, wanted to prove a point that there are too often teams you have NOTHING to fight against them. The first five of the teams I put in were somewhat capable, not unable to beat that team, yet were literally useless, followed by obviously useless ones after that, feeling zero enjoyment.
How about this? With each fight on defence, the defenders not only keep the health left over from the previous battle, but also begin to lose power as well? The point is: for entertainment value leading to a win, there remains a loss in numbers sent in and points lost with every sequential attack, BUT! In the end, you actually beat that team even if the reward is 10 points for example. And with that win, finally, you have at LEAST a sense of victory even at great cost/loss to points. I don't care if I am rewarded 0 points for beating that MT-led team, or Revan whatever, I simply want to see that team fall in order to progress to something else, in order to somehow actually enjoy this mode of gameplay.
I frequently face superior foes, frequently meet 'designed players' with low GP and amazing Meta teams, and frequently end up gaining the lower or lowest prizes. I don't mind this: what I mind ultimately is being consistently unable to defeat a team, consistently face teams that even with my best, I have ZERO chance of beating.
There MUST be some way of better balancing gameplay here.