The writers stuck with the original ending they had since season 1 - the kids are still clearly the same age as they were in the pilot. In season 1, it would have made sense for Ted to go after Robin because he was still so in love with her.
I’m not saying I’m not feeling … more than slightly betrayed by this move but the ending seemed to be set in stone. And up until Robin received her wedding present, Ted was convinced he was still in love with her. And I think he was a bit.
But I wanted more time with the Mother (Tracy). I very much do think that she was the love of his life. I just think the way they handled the ending was a poor way to go about it.
This entire season took place over a weekend. If they had spent half the season at the wedding - or 3/4 at the max, that would have been enough. The plot lines that were introduced and resolved in the last two episodes would have been much more intriguing than the filler episodes they had.
Also, when you have an entire season revolving around a pairing’s wedding only to break them up in the penultimate episode? Not fair at all. You can’t just expect us to accept that.
We spent nine years invested in these characters. We care about what happens to them and how it affects them. Barney would have thrown himself even further into his shenanigans - which they briefly addressed through the Perfect Month.* But could you imagine what his reaction would have been when he first received the news. Robin threw herself into her work - I want to see a montage of her being a focused reporter all over the world.
Also, I fell in love with the Mother, in what little we knew about her. I wanted to see more of Ted and Tracy’s interactions. I wanted to see how the Mother getting sick affected Ted - he planned to spend a lifetime with her, what did he do when he first found out? Did he immediately search for hours to find the top doctor in New York? Did he arrange for a babysitter so he could be with her at every appointment? At one point, did he just breakdown - tell her he didn’t know what to do without her. He only just found her after what seemed like a lifetime of searching. And near the end did she tell him to move on? She knew the pain of losing the love of a lifetime.
I understand that this was the ending all along. I just wanted more, I wanted better resolution. Back in season 1, I would have been thrilled for this ending but the show changed and the characters changed. As a result, the writing needed to change in order to bring everything back to the beginning.