It will be great if you make store more interesting for players to come in when ingame.Adding option to buy something interesting for blanks for exaple painted skins from players (ofc there will be tag who is original painter is and bought skins can´t be repainted). Interesting color schemes - (for example 3-4 metallic gold types from yellow to red,same with other metal types). Some palette of glossy colors for crystals (5tones of red for example from really dark to light one) again in multiple colors and this offer will be different every day,reskined arenas can be the option too.Different types of the unit bases (desert,forest,some alien hostile one etc) ,or some ships types (+skins?) which delivers your roster to the battlefield at the start will be great too