I stagger batches in my GQF 1502 all the time. Chickens don't have as many problems with this as turkeys. I've only hatched several guineas but they seemed to hatch fine.
The trick is getting your batches on a schedule, and it works best if your hatching all chickens or all turkeys, etc. For example: if you put a batch of chicken eggs in a week apart, the other batches will experience only about 3 days of high humidity and if you can effectively drop the humidity after a batch hatches, it should be fine.
This year I've been staggering a lot of small batches of turkey, chicken, bantam, and my hatch rates drop the closer the batches are set because there is not enough time between hatches to drop the humidity.