In ordinary project boards, it is possible to change sprint allocation of issues through drag and drop. It's very convenient. 

Unfortunately, in Advanced Roadmaps (otherwise superior in most ways), this seems to not be available. Instead, moving an issue sets start and end dates, even if they were not initially set. It is very annoying, because for most issues we don't use dates.

In our planning routines, we do a lot of moving things around sprints manually (with all respect to automatic planning), and although switching to individual projects is possible, it's an annoying switch, and also blocks us from using more than one project as source in those projects (because that disables the Timeline). 

Support for "snap to sprint" is the biggest gap I see in Advanced Roadmaps. Please consider implementing it.