I somewhat similarly use a Tupur mixture for bottom wicking feeding. I mix 1/2 Royal Gold Tupur and 1/2 Royal Gold Coco (or Canna) and then add about 25% perlite. 5 Gallon fabric bags each sit inside plastic tubs and I feed daily by simply pouring in all the feed the bags can soak up during the feeding session. This mixture wicks and is aerated rather well, with fine roots well distributed throughout >75% of the pot, surprisingly not thickly concentrated at the bottom. I use Adv. Nutr. pH Perfect Connoisseur base nutes (or MegaCrop 2-part) with RO water with no pH adjustment; and get rather good results (despite being a lazy grower). I also periodically add live microbial supplements.
Might I see improvements if I went a little bit "organic," added some worm casings. I presume worm casings are essentially time-release food to support microbial growth in the coco. I presume my base nutes are fully or maximally well chelated and balanced. What might worm casing or similar organic substrates add beyond the feeds and usual supplements I'm using? Are there any risks/downsides, such as unpredictable excesses or microbial growth-related pH swings?