I see I am in a minority but I would like to share my thoughts just the same.
I think you did an incredible job capturing the style you were going for @IllustriousVar but the style has never been appealing to me personally and has turned me away from many shows. For example: Samurai Jack, the art style was a big turn off but years later I rediscovered it and got into it solely because of the humor. I also feel the style has also been done to death with Clone Wars, Transformers Animated, Samurai Jack, Teen Titans Go... It is not a visually unique or compelling style. The art style needs to be something you can bring in your audience with while still resembling your product. This is where I feel the 2D style presented really falls short. Transformers Animated is the only other cartoon mentioned in the podcast that is trying to sell a product but their toys actually look like the style being used, so it works. We are talking about selling LEGO sets though, so the style just doesn't work.
I could see the 3D rendered minifigure models working, this style would really allow for LEGO's quirky humor, as you can be more brutal and violent with little "plastic" people and have it still be funny. On the other hand, I can see this style not really conveying emotion to well.
I feel stories and art styles need to stop being "dumbed down" for kids as these are some of the things that promote creativity and it is being lost.
Make the story and visuals detailed and kids will be able to come back to it again and again each time possibly getting something new from it (this is how Bionicle and Tolkien's work got me hooked, plus they both had had ties with LEGO...).
I fell in love with the Bionicle theme at a young age because it stood out as being very detailed, mysterious, and unlike anything else in terms of quality and artistic presentation.
Maybe a different style still needs to be pitched. I would love to have the show be like the 3D animation LEGO used to advertize Bionicle in their TV commercials. We know it is possible because Volta has shown us that they can simply re-texture the Toa from Journey To One. Creating a 3D model for each character and generating a 3D world, like the LEGO Worlds method mentioned by Jon, would be my preference.
I love this project and hold all the cast in high respect. I hope my input is helpful.