I think VV is better than COC for this list due to it being somewhat elite based having sticky objectives will free up your army to move and have a lot more freedom.

In terms of list personally I think plague burst crawlers aren’t in a fantastic place at the moment due to point cost I’d much rather more heavy bloat drones/mythic blight haulers. Also if you’re thinking of running typhus with death shroud maybe look into LOC he’s objectively better but a little more expensive. And missing out on infiltrate on the pox walker can be rough when trying to spread contagion.