Funny thing is I prefer AGT because it doesn't close out the characters. Thanks to the movies, for good or ill, the series ended with every character intact and ready for more adventures. Personally, I don't like finales which kill off main characters, end relationships, leave people sad and lonely, etc. If they had no intention of making TNG movies, they might have done some huge "destroy the Enterprise and split them all up" sort of ending. I like the idea, since it's all fiction anyway, that there are more stories to tell and maybe one day we'd get to hear about them.
With WYLB and EG, and even TATV, novels taking place after the finales had to do these cheesy tap dances to bring characters back. AGT left it open.
I would have been happy with WYLB if: Odo said he was coming back after he cured his people; Sisko killed Dukat and made his home on Bajor; Miles remained on the station. The sadness should be in our leaving of the characters, not them leaving each other. One is bittersweet, the other is just depressing (Sisko dead, Jake abandoned, Odo leaving Kira, Miles leaving Bashir, etc.). Of course, this is just my preference.