Beyond had some major character development in an interesting time and setting. That timeskip to old Bruce left us wondering wtf happened even though most of us already knew that grumpy asshole would end up alone the way he acted in the DCAU.
Terry stole most of the spotlight though, considering how he was when the series began and how he was near the end. Most of us can agree that he earned the cowl.>starts out as a shitty teen batman that cant do anything right>wins fights thanks to the high tech suit>eventually the suit cant cut it against some foes>Terry starts to doubt himself as batman>Bruce sees this and sends him to kung fu lady for training>in one of the later episodes, Terry wins against a villain without his suit>he learns from his mistakes>he learns from Bruce's mistakes too>even Superman recognizes his talents>becomes a completely different but good batman in his own right
That's some good writing for a kid's show.