...what is the one feature you would add, deduct, or modify, under the assumption that everything that has existed, is presently existing, or will exist (with greater than reasonable evidence) can be subjected to alteration? E.g., altering time (a bit of a heavy modification, but just for the sake of an example) and taking into account all possible outcomes from doing so (in regards to life, as it exists, on Earth).   

*Disclaimer- The title is not meant to suggest that existence is the work of creation, nor should it suggest that the universe is the work of creation. It is simply meant to question any possibilities that exist as far as in our mental capacities and to evoke critical thinking. 

Please try and keep this civilized. This has NOTHING TO DO WITH FAITH V. SCIENCE. I want to repeat that this is meant to question any possibilities that exist *as far as in our mental capacities*, and is designed in a way to evoke critical thinking.