If a brush is this bad with only half badger content, how bad are full badger brushes? Do I even want to know the answer to that?
If you buy a “pure” badger brush, you’ll likely hate it. If you choose a higher grade of dead mustelid fuzz, it can feel and perform phenomenally. Will you like it more than a synthetic? Some people do. Will you like it enough to justify the care, increased cost, and increased drying time over a Plissoft-style synthetic? Only you can make that call.
My expectation is you’d enjoy a higher-end badger, but would still prefer your Maggards synthetic more over all. The possibility you’ll become an owner of multiple Paladin and Shavemac badger brushes, though, is never zero.