CLI also have bio char in my soil mix. I added that fairly early in the piece when I read about the benefits going back to the Amazon terra preta soil, good stuff.
That's fair enough, it's one of many little cogs in the big wheel of soil life that it's probably not likely to be a massive difference either way on its own.
But I am happy to have worms leaving their by product of castings behind them to add to the positive properties of my soil as I haven't seen any negatives that I am aware of so far. I take the view that a species population will self regulate to balance with available food and moisture etc. So I feel that them being there enhances the whole living soil dynamic that I want, after all if I was growing in the ground outside then the worms and bugs present in the soil would ebb and flow as their populations self regulate. My worm farm has so many worms that nowadays I don't bother to pick them out when I am using castings in the garden.