Bear in mind, the category of obviously good or bad religious actions has a much smaller pool of examples than the uncertainly good or bad religious actions. That's what makes the answer to this question indefinite.
This is the anthropological equivalent of asking, "If humankind's sense of smell was 30% more acute, would that have had good or bad results for our species?"
Answer: a civilization produced from a species more reliant on smell and less reliant on sights and sounds would have produced completely different kinds of arts, technologies, and values. For one thing, there probably would be more insistence on the rudeness of farting in public. The broader results are unimaginable in any concrete form.
The question here isn't even, "Is religion best for humanity's future?" It is, "Has religion done more harm and good in history?"
Religion is so pervasive that it has had its fingers in everybody's pie.