To me, Steve makes Captain America. Captain America does not make Steve. And I think it speaks to the strength of his character and how's he's been written over the years that despite others using his name, it really doesn't take anything away from him. That said, I take these new characters for who they are. The fact that they also call themselves Captain America is also incidental to me. To me, they're just supporting characters to Steve. We all know Steve is the fer real Cap. The fact that these other good hearted people also call themselves that almost doesn't matter. It's not like they're really trying to upsurp him or anything (and I don't think that Marvel has any sort of intent to do that, either). If anything, it proves how much Steve as Cap inspires people. And I see that as a good thing, personally.