That's incorrect. What you meant to say is not that no tension was built, because I certainly felt it. You mean that you didn't experience any. That's on you, so more of a self-criticism, or just your perspective that others may very well not share.
I'm sure that
Killer7 is greatly relieved to have your permission and agreement. I'm absolutely certain that among the hundreds of hard hours of work that go into an update, many of them are spent wondering if it is all okay with you, John.
The bit where you assumed it mean it wouldn't be a cliffhanger is what is technically known as an assumption. In actuality, what on earth gives more time to react, go post, come up with theories, etc, than the end of an episode? There's a big difference between what is 'inferred' and what is 'implied'.
As someone with a lot of years of experience in writing (and reading), personally I wouldn't really call the end of this episode a cliff-hanger at all. It was a perfect break point that actually ended a lot of worries.
You know that the term cliff-hanger was literal, for those old movie series in black and white where the hero was hanging on to the edge of a cliff about to plunge, or tied in the path of an oncoming train, or some similar event where the whole premise is "Will they die?!" The ending of this episode was the exact opposite. Sure, it left us desperately longing for the story to keep going, but that is
not a cliff-hanger. That's just "good serialization".