I don't know... I tend to also believe the brand identity of the Avengers was severely damaged with "Avengers Disassmbled" and the sudden inclusion of Spider-Man, Wolverine, Power Man, Iron Fist, Dr. Strange, etc.
And yeah, Uncanny Avengers?!? Yikes. I mean, if Marvel wanted to work out this concept so bad, why not employ the likes of Scarlet Witch, Quicksilver, Beast, Wolverine, Justice, Firestar, and Namor? You know, Avengers who are also mutants? Instead, we have Cap, Thor, Rogue, and Havok?!? What the-?!?
Plus, the idea flies in the face of everything the Avengers represent - that is, "fighting the good fight for EVERYONE."
(The X-Men's identity is all about trying to create a bridge between humanity and mutants.)
Also, the Avengers have almost always lent Xavier's group a hand when they needed it most. Magneto's "rehabilitation" aside...