I get why BTE exists, and to be fair it is an interesting take on how to promote yourself, but also your show, with even some sort of internal mythology. Also it brings the fans and the performers together in a way most wrestling promotions don't do.
However, on the other hand, I think they shouldn't rely on it - sure it could be some fun supplementary material that adds a little more charm to the product, but should it be essential? Considering that they have their own "brand" of humor, which, taking Grimmas' reaction as an example, can be off-putting, it may allienate some of your audience if watching it is required.