It wasn't that he should have professed his love; it's that after all that she (and I) went through, there was no payoff. I didn't feel like the episode (or season) gave me what I felt was promised to me, and there's an analogy for me there with Martha's expectations.

Her leaving is the only *good* decision anyone made. But on the other hand, she was a large part of why I now like the show so much.

Overall, the show cheapened the contributions of women (they are evangelists or destroyers of men), exacerbated the Doctor's world-saving fantasy, and generally took away the qualities I'd enjoyed about the show.

Obviously, that's just my opinion, and if you liked it, I'm all for it.