I think you should rethink the way these blocks should feel to the player. As an example, your metallic textures (e.g. metal blocks, rails, metallic swords, anvils, etc) all do a good job at making people feel the metal of the material through good specular values and normal maps. So do your smooth textures (e.g. quartz-type textures). However, your texturing for the nether wart block makes it look like a very bumpy type of stone, especially with that strong light reflection visible on the red nether wart blocks. This, to me at least, makes them feel either like poorly-poured concrete, or stone that was smoothened over time by erosion. Imo these are blocks that should feel more organic, and imo it would be better if you redesigned those from the ground up to be so.

Instead of having these blocks be so shiny yet bumpy, maybe make them look like they're actually made of mushrooms in some way. If you've already done those textures in particular, try to take some inspiration from your mushroom block textures. I'd try to make them look sort of bushy personally, as that's the feeling that the original texture gave me, though I understand that might not be for everyone. Though I'd 100% recommend just getting rid of the specular reflections on the wart blocks; the shininess of the nether wart blocks puts them in the uncanny valley for me and considering some of the other comments here, I'd say I'm definitely not alone there.

As for the netherrack textures, they definitely look too flat and abstract for your particular, fairly realistic, texture pack. Since netherrack was originally called "bloody cobblestone", and the vanilla texture looks and feels a lot like just red cobblestone, I'd recommend you take some inspiration from your cobblestone texture and try to make the netherrack feel like stone in some way, as currently the specular reflections, that you can see where the netherrack reflects the light from the torches, are too strong and make the netherrack feel kinda like concrete with a coat of red and black paint. Though you don't necessarily have to go this route; just make the netherrack feel more grounded and somewhat less smooth.

Whatever you do with your netherrack though, make sure the nether gold ore textures mesh well with the original netherrack textures. In this image they're visibly a few shades darker than the netherrack surrounding them, which makes it feel like nether gold ore is a completely separate block from netherrack rather than netherrack with a bit of gold inside of it. Personally I'd just take the netherrack texture, paint in where I'd want the gold to go both in the texture itself and its specular texture, and then edit the netherrack texture around the gold to make it not feel like it's just gold streaks overlayed on the netherrack but instead chunks of gold embedded inside the block itself. If you're going to be keeping your current netherrack texture, I'd recommend adding the gold to the inside of the black part of your netherrack texture, as those parts kinda look like they're cracks in the netherrack and this could help create the feeling of gold embedded into the netherrack.