Even assuming that “God creates the evolving ecosystem using ecological natural selection or symbiosis”, you can’t help acknowledging illness, decay, death, natural catastrophes, etc. as consequences arising from evolution.
These effects can be considered certainly evil as far as they affect mankind created in the Image of God.
So the question arises: Why did God shape creation this way?
My answer is as follows:
God creates the first Image Bearers in a stage of “original Blessing” capable of overcoming illness, aging, and death (what is not the same as having “eternal life”).
After the Fall God in His mercy decides to give sinners the opportunity to atone instead of throwing them to join the devil and his angels in hell. So sinners remain on earth in the stage of “need of Redemption” (the so called “stage of original sin”).
For the sake of Salvation God permits that humans are affected by illness, suffering, death originating from evolutionary mechanisms: Indeed such “side effects” of evolution help us to realize that we are not “like God”.
To this explanation one could object:
If evolutionary “side effects” like illness, suffering and death are supportive for Redemption, why did not Got create the first Image Bearers bowed to all these effects already before they fell?
If God had created Humanity in such a way, He would have been the author of evil. So God can let “side effects” from evolution affect Image Bearers only AFTER these have sinned.
Since God in his omniscience foresaw the possibility of sin, He wisely made to Image Bearers only a little population among the millions of human-like animals spread all over the earth, according to Genesis 1:27 and 2:24. This was a population living in Mesopotamia, likely Sumer, who were called to live according to the primeval commandment Jesus refers to in Matthew 19:3-6 and Mark 10:2-9. Before the Fall these Image Bearers were not affected by illness, suffering and death: they lived in a stage of “original Blessing” (in @Aleo’s wording). After some of these Image Bearers (possibly not all) transgressed God’s commandment, this population lost the stage of “original Righteousness and Blessing” and evolved to the population around Noah as described in Genesis 5-6, ending in a stage of great wickedness, corruption, violence and disorder.
In this light the Flood appears as a Second Act of Creation: God wipes out the disorder and re-creates order. At the End of the Flood God transforms all human-like animals around the world into Image Bearers. This second act of creation is referred to in Genesis 9:6.
Since this very moment the following important principles hold:
God identifies “Mankind” and “Being in the Image of God”.
Both, the status of “Image Bearer” and that of “Belonging to Humanity” can be ascertained through cut-off anatomically observable features.
For the sake of Salvation God permits that all Image-Bearers (members of Humanity) are affected by evolutionary “side effects”.
Notice that according to this explanation God is not the author of human evil and sin at any moment. The authors of human suffering are always we, the sinners. Nonetheless God in His mercy revealed us how to use evolutionary “side effects” to the end of salvation: He decided to die on the Cross, to show us (amazing grace!) how to transform suffering into love. This was fully realized by the good criminal being executed in a cross besides Jesus: the guy jumped on the chance with a request (Luke 23:42) we all should have in the lips when “sister death” (this “evolutionary side effect”) comes to visit us.