I understand the frustration at not being able to book FPs for the Millenium Falcon in the same at as you can for everything else.
But, imagine now that you were able to book an FP for a Thursday @ 2pm. Come Thursday, by lunch time it’s apparent that Galaxy’s Edge is full to capacity, and that no one is in a hurry to leave. Already those with FPs from noon haven’t been able to get into the land to use their FP. You now arrive and can’t even get into DHS.
Disney are left with a nightmare situation of having hundreds of guests all waiting at Guest Services.
Far better to have a virtual queue system in place to get into GE so that guests can go and do other things and return at a certain time. Sure, there’s still a chance that the land will be full, and the line to get in is growing. But at least the result is not quite as drastic.
@Magic Feather has already said the plan is to have a virtual queue system in place. Whether that’s immediately or after a few weeks we don’t yet know. I imagine we should find out though a few weeks after GE opens at DL. When they see how things work there, they will no doubt announce plans for DHS.
As for planning.... plan to be there on a certain day, early, and hope for the best for now. When they announce the operational logistics for DHS then you can adapt your plan if necessary. Stay onsite and hope for EMH; be prepared to book an upcharge event; have a back-up day planned.