Well Ballistic Advantage seems to have a pretty good rep and Bullet Guy is really sold on em. He beats the snot out of his he says. The barrel on my current AR has many of the same profile foibles you mention but as you've seen does well, and has held up well. Nothing is ever as perfect as it theoretically could be but can do well enough. I hope such is the case with my new carbine. Let's not forget that barrels are wear items that are to be periodically replaced. The Ballistic Advantage product, as is Faxon, seems to sit at a very good cost/performance nexus that makes this fact bearable. I think I'd cry when I'd shot out that Lilja barrel. There is something to be said about an item that you have no qualms about riding hard and putting away wet.
