Holes in the leaves indicate to me that I'm providing sustenance for insects, which in turn provide food for birds raising their young as well as insect predators and such. The holes do not bother me, and for the most part, I have to look for them. Definitely at a distance, the trees look fine.
Although, I've seen tree hoppers/leaf hoppers before, these seemed to mesmerize me. Not only the color, but how many that seemed to congregate on the stem of one of the quaking aspens. It excites me to wonder what new forms of life I'll encounter in the months and years to come. The more diversity in plants I provide, the more diversity in animal life will appear.
...And one more that puts the "weird" in he wonder: