Yes, after certain levels, others superceed the Noble, but I think ast this point most Nobles will be multiclassing anyway
That's the thing, I don't think anyone goes beyond 12 on Noble, since on that level you get Do you Know who I am? which is a very cool ability, but there isn't much after that, specially, there is a blank level waiting for you next, so those extra feats are more to please those very few guys that stick to the noble class to the end...
By the way I also allow nobes to get weapon specialization, improved weapon focus and specialization. I think the noble style of combat is the same of the soldier. But anyway nobles tend to get other feats...