Arachnophilia is a mod that makes spiders better and will be updated as time goes on.
As of 1.2.2, the mod only adds one "new" feature:
Spiders will string up cocoons as part of their nest building without needing to kill players first

”…they weren’t part of our crew… must’ve been left behind.
In addition, the mod makes spider highly configurable:
- Spider speed when chasing the player and while setting up the nest.
- Spider damage and health.
- Min/Max webs.
- Min/Max web length.
- Min/Max web distance from one another.
- Three values for web placement speed.