Because Astalor was one of the biggest problem with Brann, now it has left the standard and also some battlecry minions with tons of armor build… so they think that should be enough for now. We will see it.
Crazy world you live in when you think a shudderblock tendril is in par with a brann tendril deck. The only reason they come remotely close is the 1 extra tendril card shamans get and the possibly more focused draw of sblock with the battlecry draw location. But with all that, no it’s not good compared to war.