I hope they don’t, fluid mixing was just tedious. Either requiring full focus or else being quite punishing.
What the benefit of having to watch out not to mix pipes is, exactly, without any advantageous effects, remains a mystery to me.
Analogously like the removed crafting cost for blue-(and red-)prints and the blueprint book.
Having an overall updated, predictable, system of fluid behavior ist, ob the other hand, certainly a desirable feature.
Not to say having affectable decoration isn’t a nice immersion increasing feature...