I see it as Marlowe using the finale to rile up the fan base so everyone will be talking about it all during the off season.
The number of fanfics that have come out in the last few days since the episode (and even before) is incredible.
Marlowe cleverly left things open for a lot of interpetations coming back. Kate was offered the job, but we don't know her answer. Castle proposes but doesn't exactly project an enthusiastic attitude. Lots of room for fighting coming back.
The fans were told that Castle and Beckett wouldn't be breaking up, but there will be some 'bumps' along the way.
Tank (who isn't saying that Kate (Stana) needs to go back to a short hairstyle, but the producers definately need to dial back the current length... too many buns, and ponytails)
