since we're talking about Webber anatomy headcanons here:
1) Webber's silk beard comes from their mouth like excess drool. That's because I believe the spider in The Constent puke up their webbing because they have no thorax; so when Webber drools in their sleep the beard starts forming.
2) Webber has a thin exoskeleton so they do shed but it's like skin so it comes off in chips and flakes.
2.1) Adding to that, they also have BIG bones.
3) This one is purely hc but something tells me that they have an sensitive stomach. I know they can eat monster meat and stuff but irl spiders need to liquidate their food before consuming it and although Webber has teeth to chew, I just feel like they have a hard time digesting meals that haven't been chewed thoroughly.