devtrackers.gg
Astellarn / BSD are new base models for dragons for us to work from when we get to doing redesigns for others. It's a surprisingly big job to do all the rest. Art resources are scare when it comes to doing side projects and supplimentary updates, they're much better spent on new and updated assets for headline updates. As a result you're not likely to see existing dragons updated in the short term but when they do get done they'll be at least as good as these guys :)
I'm pretty sure the "black dragon" that attacks you during the verak's boss fight is just a darker colored Gorvek, in other words a literal reskin of the fire breath animation during vindicta's phase 1 boss fight
This is correct, it's a Gorvek reskin >_>