Make reballance of battles. For example:
1) balance by grades. If you use c- grade, you will fight with d, c and b grade ships. If their is no people online- botz help.
2) rebalence matchmaking. If your team have 6 dd and 4 cl- you cant fight vs 6cl and 4 ca. Battle mast be like: 1-2 ss, 1-2 cv, 2-3 bb, 3-4 cl and ca, 1-3 dd, grades +\- 1. Ofcorce if there is no people online- botz in help. Everyone happy, everyone spend $
3) unlock lvl of buidings- to long. Make 8 lvl of buidings
4) make "war boundaris"- 3$ and every day, for 30 days, you get 100 gold.
5) make special packs with "extra ships of s-grade".
6) show real chence to get hight tire grade in casino.
7) dont pay to that man, who made this economic system (bcs new players will not spened $, old players too, bcs they olready have everithing), give him bottle, so he can sit on it.
8) make team match with friend list: the player can make team with friends vs random, other teams etc.
9)make normal aftermatch resalt screen: not only my resalt, but resalt of all tem, by names. first 2 in oposit teams eart 1 gold coin.