I like boil additions, but I only use them at 60, 10, or 2, depending if I want bitterness, flavor, or flavor + aroma. Any hop addition in between like 60 and 10 is a waste for a brewer who couldn't make up their mind what they wanted IMO. Keep it simple.
That said, I probably will be using extended flameouts for all my IPAs in future. APAs, maybe not. But IPA, yes.