You can tell the writers cared way more about the character goodbyes and sentimentality than the plot which is a shame. DS9 is so good because of its excellent plot arcs so it's a shame the finale doesn't really wrap up the show's main storyline very well.
Not having Bajor join the Federation was also absurd as it was like.. part of the premise of the show? Thankfully the novels sort that out
Still, WYLB is superior to the NuBSG finale. DS9 suffers from overtly simplified religious stuff but that element killed NuBSG stone dead.