I like red dots, and have them on both of my ARs. I admit they make me a bit lazy, but for the distance they are zeroed, nothing helps me shoot faster or more accurately. I would consider replacing one with an ACOG if I ever acquired one, but in the interim, the red dots will do.

Have you tried focusing the scope on anything at distances? Knowing what the glass is capable of would help in deciding where it should go.

I still like shooting open sights, but distance, size, and movement are all getting harder for me to pick up as I get older. Money can only compensate so much for age.