Dead Focus: Your critical chance is increased by 10% for 5 secs after using a charged Aimed Shot

Note: it is increasing even not charged. Rogue's are imbalance already having 15% deduction to armor with 250% crit. Having +20% to +30% added crit chance by spamming aimed shot is totally an over kill. A maxed rogue can get up to 50% crit chance with this it can reach 80%?