some
SPOILER SPACE
just in case
Though I don't know if anything below constitues a spoiler.
It means they have to contrive to keep Ross and Rachel apart for another year. And after doing that, they may not be able to convincingly contrive to get them back together.
Yes, I think they intend to end with Ross and Rachel together. It's the reason for Ross being the father of Rachel's baby. (Was the rumor Jennifer was trying to get pregnant untrue?)
The Vegas wedding convinced me that Ross and Rachel still love each other, even though both are strongly in denial. But that doesn't mean that they have to get together.
But now there's a baby. And unless the parents cannot stand the site of each other, or one is abusive or unfaithful, they should get and stay together for the child. They can work out anything else.
Yes, I am old fashioned in many regaurds. And I make no apologies for it.
For the Joey and Rachel supporters, if it hadn't been for the baby, I don't think I would have had as much of a problem with the relationship. I expect the additional season means they drag this story out a bit longer before ending it.