Well me for one, did like the ending.I know unpopular opinion here but :P I am and always have been a Ted Robin shipper, so it was quite a surprise for me, and hell yes I was happy.
Like Ted's kids said, the entire story was more about how Ted could not fall out of love with Robin than the mother.
Plus , Ted got back with Robin after 6 years of Tracey's dead, and if she was live I don't think Ted would have ever thought of doing so. But years had passed, its okay to date another person , some one who would make him happy. And with all the seasons I dont think Ted and Robin ever had totally wiped out their feelings for each other.
having said all that, I was sad about Tracey's death , she was a sweetheart.
Barney's scene with his little daughter made me smile.
i just wished instead of making the whole season on one weekend they could have played this story . It was way too rushed.
[All this, totally my POV and no offense fellas]