Never heard those complaints, but I guess everyone here has opinions about life of components and shifting.They wear too fast, and even when they're not worn, they shift like ****.
I've been using an FSA triple crankset for 39K miles. I've replaced the whole set after 18K miles, then at 36K miles replaced just the middle ring....the 53 and 30 were still fine, ie, passed my "free-play " test. Don't know if Shimano rings last longer, but I'm happy with the life I get from the FSA rings.
Same for the shifting. I don't have any problems shifting chainrings. I switched from a bike with a standard Ultegra road set up, 52/39, and didn't notice any degradation of front shifting going to the FSA Team Triple set up.