I think it would be highly useful if one could create an Active list and then all or selected campaign leads could be assigned to that specific list automatically. This way the sales reps would know where to go for fresh leads!
@AndersLaybourn take a look at this https://community.hubspot.com/t5/HubSpot-Ideas/Select-HubSpot-marketing-campaign-in-a-list-filter/idi-p/401897. a hubspot employee created the idea.