At the moemnts, unless you are new players, achievements are not intresting enough for paid preium players to complete. If you give out higher values rewards, then players would buy and invest in certain weapons just to complete some achievements, in order to get say a unique / hard to buy pilots or weapons, mods parts. 

Some achievements are also clearly outdate, for example it is next to impossible for players to achieve 400 kills with stasis beams or Auto-canon , it is fustratings. I do not mind and have paid a lot for these games, but please make the achievements achieveable, so that it can be fun. 

And when i upgrade my Auto-canon to purple or the maxium grade, you made me to combat aginst enemy armed with 5 stars revokers. How is that even playable? i have also paid and invest in revokers, but please make the game more fun with better match makings. I am a paid player and of couse paid players should have an advantage, say 30% , but i also enjoy battling with weaker weapons to test my skills, so please make the game more fun please. Or may be you can adjust the power rating of each weapons so that they can reflect the true power of each combination more accuratly , so that we have a better ideas on how to adjust our hangers to have fun.