To me something like that needs a purpose of quicker rate like say a redstone dust equivalent to the different repeater settings for example, or separate connections for different contraptions so that not all join (like mods do with different redstone dust like colours or pipe mods with sandstone pipes or microblocks to prevent connecting to others).
A different one would be nice but it needs a purpose. Colouring Redstone would be fine enough but only if it has a function not just 'I have Blue, Yellow and Green dust now' but I like function before decor as 'everything' can be classed as decor if you use it for it's non-intended purpose or the block is useless.
A fine suggestion but needs more.
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