This game mode is dying and actually really booring. But honestly, it was fixed before, and nothing ever works for everyone. I dont think there is a way to fix it, so it fits everyone. I can suggest to do more guild wars, rote and other game modes. I started to do that about year ago, and really enjoing the game now. Not trying to go for new shiny things. Working only for guild and what i want, totally ignoring gac, doing 10 points thou. And honestly crystal income is not great in lower tiers. Work on your fleet to get crystals
Maybe it needs a total rework, but its ea, disney and cg game. Anything they do, like any other buisiness needs to earn money. So basic/serious fix without earning anything is not really interesing for them. They will fix it if it beneefits them somehow. Getting rid of gac and adding something totally new maybe...maybe, but then again pay to win will be unhappy, and game will just die, because new players dont really find this game interesting. Look at the google rating. It lives because it earns money atm.