I somewhat disagree, I think the fascinating thing about Peachfuzz/Creep is seeing him in different scenarios, seeing how he reacts, how he attacks his victims mentally before he does so physically, seeing how close he gets to unmasking himself, seeing him turn his own fear into a relishing of the hunt, etc.
That's what I love about the Creep franchise, I don't even particularly need the deep lore to the character, especially if, while executed superbly, is a somewhat cookie cutter serial killer 'trope' origin.
The fact that you get some of both really strengthens the idea of doing the series. I wouldn't mind seeing another batch of Tapes before we get a final closing chapter in the form of a full fledged film sequel.