Tales of the Walking Dead was a mixed bag. Most of the episodes were a bit weird, and even... should I say, supernatural? The Alpha episode was definitely the best one if you are interested in the main series. The Terry Crews episode had more of a 'Fear' feel (which will make sense if you are familiar with Fear and have watched that episode). The others were just strange and/or predictable.
I think that TWD jumped the shark on being unafraid to 'follow the storyline' when Negan killed Glenn. That made no sense (given the whole 'dumpster' thing from the previous episodes) and was completely unnecessary. After that, there was a strong reluctance to kill off major characters, with the only major exception being Jesus at the start of the Whisperer war. (I'm not counting Tara... she wasn't even in the comics, although she was in the comic universe.) They did kill off Carl, but I gather that that was because they had issues behind the scenes with Chandler Riggs.
I still maintain that the 'best' character for Negan to have killed off in the 'lineup' would have been Daryl... it would have been shocking and lead to all kinds of plotline ripples. But no, he was a fan favorite, so they made him safe.
Since that time, it's been clear that all of the major characters are 'safe'... to the point that even the actors who wanted off the show were left alive, rather than killed off. And that has made the show less exciting. Game of Thrones also tread into this territory... but at least they made a big turnaround on that toward the end of the series, even killing off one of the previously 'untouchable' characters. I'm not seeing that here, although the finale may surprise us.
The loose ends thing bugs me, because rather than a proper conclusion, we're likely to have the stories simply continuing in different series... and that's just a cheap gimmick to keep us watching. It's one thing to send Morgan and Dwight off to Fear... it's another when the entire TWD series ends with ongoing questions.
Still... I may be pre-judging. We will see what happens in the final 3 episodes.