I don't like that, if there's a season 9, they're going to change course at some point in S8. Play it the same either way.... Barney/Robin wedding by the end of the season, and Ted meeting the Mother. If there's a ninth season, just grow from there. Perhaps at the end, Ted and the Mother find out they're having a baby.
I'd be fine either way, I just don't like the idea of postponing things.
And if S8 is the end, I hope there's at least a few episodes with the Mother. I don't like the idea of....
Ted: "Hi."
Mother: "Hi."
Narrator Ted: "And that, kids, was how I met your mother. kthxbai!"