I love the blender and getting a costume. I am now to the point I have a good costume for just about every hero except a couple. That is just the way random works and I am ok with it.
As new heroes come out I realize my chance of getting them a costume vs getting something else for iron man, spider man, and the hulk is not as good. Once I got past the point random heroes where not a good investment, I bought the rest in the order in which I had the coolest costume for them. It was a lot of fun and a driving force for playing.
I know I could just go buy my poorly dressed heroes something. Maybe it would be nice if the blender didn't drop costumes you already have in your bank or on. That would at least improve the odds. I don't want to tweak the blender much because of all the fun I had with it. I just want that new cool costume excitement again.