Probably not; when a drop ends, thy submit their order.
If you are entirely unsure, I would just order without switches and get them elsewhere when you know what you want. A couple extra bucks is worth knowing you got the ones that will keep you happy.
That's exactly why I didn't order keycaps with the drop. I hadn't decided yet what I want, easy enough to get after the fact! They're not expecting to ship until the end of February, anyway...