Good luck finding your "perfect" bra....I'm still looking....Between the straps falling down, cups that bag, constant tugging on the cups to get coverage, and feeling like I'm being squeezed...ughh!
The biggest complaint I have is the same as yours.....Loss of its holding power!! They start out nice and perky then one day I put it on it's back to the dreaded rock in a sock look....
They also just fall apart way too fast!....One day I had on a v- neck tee shirt, I looked down and it looked like I had a little white snake peeking out of my cleavage. It was the under wire!..
It had worked it's way out of the bra and was getting pushed out!.....
I've also had some bras where the elastic on the side panels just snap!...It looked like I had spaghetti noodles hanging off from under my arms!...I swear men must make these things!