To be fair, the show hasn't ever really been about him meeting the mother. It's just stories about him and his friends within the framework of coming close to meeting the mother so many times.
I agree with this, which is why I don't get bothered when Ted is a bitch with a girl
If there's anything more than an episode or so about the mother, then it will be a little disappointing...like some have said, the show should end with the whole "and THAT is how I met your mother.." thing.
I disagree with you here though. Like you said above, its about the stories he and his friends shared together including showing them grow and develop throughout the show.
We saw Marshall and Lily go through a break up, get back together, get married, finally mature enough to have a kid. Marshall eventually makes the decision to turn down his high paying job to take his dream job and help the environment. Lily had to give up on her dream as a painter to be with Marshall and start a family.
We saw Barney move on from one night stands with sluts and Robin moving on from meaningless relationships and to be able to finally settle down together.
Therefore, I think its only fair that we get to see Ted's final story and see him develop and finally be with the mother and see how he got that way. We've seen so much from all of the characters and how they developed and changed to finally get to the point where they're settled down and married/have kids. I think we'll see the same from Ted.