Would you stop feeding the plants with fertilizer ...

I would keep them helathy as always. React to symptoms and don't overfeed/underfeed. if your formula or fertilization process does not result in consistent results across numerous strains, then there's probably something off with the formula and less to do with 'picky' plants. I regular run 7-8 strains pulling off the same reservoir, which in a soilless context is not unlike sharing the same pot. A proper formula works well on 90-95% of all plants. Soil being a bit trickery but can get to the same place because it's just about ratios of available nutes and their overall concentration... similar contexts will have similar results, because this is a deterministic reality. Outdoors in the ground, they all share the same resoucres. No reason why it can't work the same in a pot too. Also, you don't see people leach out all nutrients from the earth around a pot plant outside right? No, because that would be an absurd thing to do.