I love bioactive enclosures, I have my leopard gecko in one currently, and am working on getting my tegus enclosure to be bioactive along with my ball python and BTS once they get permanent enclosures. I'm even currently planning to do a bioactive setup for a future gargoyle gecko.
However, when it comes to beardies I'm iffy on it. You could go bioactive if you provide a big enough enclosure, your experienced and know what the risks are and how to properly setup a bioactive enclosure, but I personally wouldn't do it. The risks outweigh the benefits from what I can tell.
Dont get me wrong, I'd love to do a bioactive beardie enclosure but I care too much to possibly risk their health just because it looks cool.
That and I dont have enough room for three 6x2x4's or 8x2x4's.