Cave spider nests (like slime chunks) and silkstring!

In the caves and cliffs update, I think there should be a new structure/world gen feature for cave spiders. In specific chunks, there should be spider's nests where cave spiders naturally spawn, inside of these nests there would be a new block called the silkstring block that makes the player walk slowly and not be able to jump, like the honey block, but it would be a full block without the sliding mechanic and it could be crafted using 9 silkstring. Silkstring would be a new item that is only dropped by cave spiders, it would be used to make the silkstring block and a new potion that would allow players to climb on certain blocks like a spider, it would be useful for traveling up the new mountains. Silkstring could also be used with tripwire hooks, it would be easier to see than regular string but it would send out a stronger signal and it could be waterlogged. Cave spider nests would start to generate in a single chunk from about y=40 down to bedrock. Nest passages would be narrow and steep, allowing for the fight against cave spiders to be more intense.