Fighters you can't field no longer clutter the picker
Last patch we added a toggle to hide the Fighters that can never be fielded this match. Now that is simply how the picker works. The moment you pick a commander, every Fighter that cannot legally take the field drops out of the pool: wrong affinity for your commander, banned by the ruleset, or costing more mana than the whole cap. The old "Hide unplayable Fighters" checkbox is gone, because you no longer need it.
The greyed-out state now means one thing only: the Fighter is legal, you just cannot afford it with the mana you have left. Drop a pick and it lights back up. And Open Alliance still lets you reach across affinities, so nothing you are allowed to field is ever hidden from you.