To be fair, L&P isn't even the slower dev doing renders here. I have seen several devs who try to deliver great quality being even slower than him. I saw you in False Hero thread, for example, and that dev is slower than L&P, he makes great renders too, even with better lighting, although he doesn't work the characters' poses and expressions that much and he doesn't creat NPC, animations, nor outside scenes and he doesn't put sounds neither.
Stoper, the dev of Jessica O'neil, is also slower than L&P, he delivers less renders per update, like the half. The one from Bad Memories is that slow too, even when those renders are inferior in quality and he doesn't create many NPC (although he says he doesn't have the fastest machines). The dev from Become a Rockstar ins't too fast neither, although he delivers a lot more animations. The dev from Anna takes his time too, despite his renders are not as delailed as these ones.
I would say that the big exceptions of devs who deliver renders of pretty good quality in a decent time are DrPinkcake, DecentMonkey and the one from Treasure of Nadia.
As you can see, he is basically as slow as the most of the devs doing renders of similar quality, the principal difference is that he creates a lot more renders per event, in my opinion unnecessarily. The other devs can deliver a full day in 500 renders, instead, he created 1000 for the third part of the day (And many unnecessary dialogs too). That's why the other stories progress and this one doesn't. I'm planning writing a post showing some of the unnecessary renders that he creates in some simple scenes, that at the end means a lot of wasting time.