well idk about the blurry but I think it'd be neat if you could customize your textures through the options menu if you have multiple texture packs available and want to make use of some of the textures but not the entire pack.
I believe this is called anisotropic filtering. (Or maybe it's actually bilinear or trilinear filtering, I'm not an expert on the subject.) And it's not meant for 16px textures, it's better used on high-res textures to make them look a bit more natural. In these screenshots, it seems like the filter is turned up quite a bit, which is why the redstone torch almost looks round.
If you could show us a picture of what this looks like on a high-res pack, that would probably get more people to support your suggestion.
I get offtopic a lot, be warned. I also often mention a Minecraft clone called Minetest. The clone is nowhere near playable with it's default game in my opinion, but it's at least the start of a good open-source voxel rendering engine, and maybe one day it might be decently playable.
Actual texture filtering doesn't blur textures like that, rather it switches between mip levels depending on the distance from the camera, to prevent texels from becoming smaller than a pixel and causing flickering in the distance.
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Author of the Clarity, Serenity, Sapphire & Halcyon shader packs for Minecraft: Java Edition.