Fivetran's GA4 connector is sync'ing 30 days' worth of data on each run. The rationale from Fivetran's product manager was that this help update attribution data that may change within a 30-day window. However, if I am not pulling any attribution-dimensions (country, for example) then retrieving 30 days' of data is unnecessary. Reprocessing 72hrs of data should be sufficient. 

The current behavior has a significant hit on MAR as data from the last month is fully reprocessed on the 1st of each month.