As much of how much this game has improved with the relaunch. The one major problem it has now is the grind, mostly from getting items from missions. For me, since the white items supposed to be like common, the chance should increase to 60-75%. Another great way to help reduce the grind for items from missions is multiplying the rewards. I know with zero stars you'll only get a chance of one item for common and rare. Once you get one star, you'll get 2x commons and rares. For two stars, you'll get 3x commons, but the rares will still stay the same as 2x. Finally, when you get all the stars, you'll be able to get 5x commons and 3x rares. Anyways, this would be a great way to reduce the grinding for the game and it'll make the mission rewards "more" rewarding.
I gave this game 5/5 because everything was fine and I enjoyed :). But I gave it a 1/5 for adding the p2w wings that costs $20 that screws over non cashers.
It seems having only wings to pay and no f2p wings makes this game more unbalanced. If we don't get freed wings like the mount in lv 40 im afraid more non cashers will quit playing.