Achievements are great, and the ec reward is reasonable. However, I am worried that if more achievements are added, the worth of an ec could possibly decrease. Therefore, prices may increase on ec weapons, which in turn lowers the worth of winning events.

In addition to this, a small minority (or maybe just me) does not want an event coin from achievements. Achievements provide insufficient event coins to purchase a worthwhile weapon from the event shop, but to avoid hoarding I refuse to accept ecs from events. It would be nice if there were alternate rewards.