That was a good one that could have served as a series finale if they would have been looking for a time to end it.
Same with this boat thing, it seems like it would be a way to end the series also.. but I know they are committed to at least one more season, which is great if they keep pumping out good quality, and this season has been pretty solid throughout... some hits, some misses... they have definitely started to trend towards using past material as a source of humor which is fine as they probably figure they aren't attracting new fans at this point.
I know Kaitlin Olson signed up to start a new series called "the mick"... and as those characters seem to be getting more and more other jobs outside of the show I wonder if the series has its days numbered.
As an aside.. did you know Rickety Cricket wrote these boat episodes