Before revision:  However, without careful design this could create vulnerabilities that incentivize miners to engage in coin-hopping strategies which yield an unreliable system due to  unstable processing of transactions.
After revision:  However, without careful design this could create vulnerabilities that incentivize miners to engage in coin-hopping strategies to manipulate the block difficulty for profit. Such miner behavior results in an unreliable system due to unstable processing of transactions.