Such as that God is cruel, since if he used evolution, then all we have is a record of death and suffering, certainly not the God of Love that the Bible record, that tells us that God sent his Son to die for our sins and pay the penalty for our sins, which is death, which is how death and suffering came to earth, by one man's sin. Take away that man and the you have no reason why Jesus should have even come to earth, since he died because of some mythological person,according to the bible, brought in the death and suffering. That was what God told Adam would be the result if he ate the fruit and Paul use the imagery Adam showing how he brought sin into the world and compared to what Jesus did, by the fact that he brought Salvation to men.
1 Corinthians 15:22,26 For as in Adam all die, even so in Christ shall all be made alive.
26 The last enemy that shall be destroyed is death.
But if God used evolution, then he had to have used death, since that is what the fossil record shows, a scale of death, not an enemy according to the Bible but as something that is meant to be.