> understand why that twist is a big deal

The biggest heroes in the show's universe are really the biggest villains.

> slow burn series tend to have people lose interest really fast.

I don't know if that's true. For example, in Game of Thrones, the White Walkers had their first pitched battle with the humans in season 8. The show took its time to build to that moment, and the tension and the expectation was extraordinary.

The show then blew it by rushing through the 8th season, which completely ruined the show's reputation, in part by moving way too fast.

I think there's a balance. The long periods where Danaerys did nothing were mostly boring.

But for a while the White Walker's were some of the best villains on television because they took their time to build them up.

I want something that takes its time to be good. The Lockwood and Co books built up the mythology over a series. The biggest twist in the series shouldn't be given away in the first 15 minutes.