It really just depends on whether or not you have a preferred resort where you really want to stay. With the different policies in place, you can book a room-only reservation now to hold a slot at your ideal resort, and set a reminder for yourself as to when your deadline(s) are for switching to a package or changing the reservation entirely as new deals might be released later.
It's been a little while since I went through runDisney's travel group for our upcoming reservations, but I think we have until 45 days prior to the scheduled check-in for us to switch it to a different package or change the reservation entirely with little or no additional cost (double check yourself to be sure).