I'd like to be able to track account actions over time. This reads like "poll the list of actions reported by /v2/actions, consuming those that are 'new' on each iteration". As of now, that means that I'll have to consume the (paginated) actions list *every time* I poll the API. It's up to me to keep track of which actions I've already seen and only record the new ones.
My preference would be to provide a filter "I last checked the actions API at epoch time <X>" and receive *only* actions that have occurred since then.