Instructional formats that rely heavily on independent learner initiative are not always suited to students with EF weaknesses, as they require initiation, sustained attention, planning, and organization (all of which are key EFs). And, when they are technology-centered, they are also not as intrinsically engaging/reinforcing as person-to-person instruction (or, in this case, person-to-person distraction), even when they have been game-ified.
Of course, personalized learning doesn't have to require this much learner self-regulation. Some decades ago, I was a student in a fairly high-touch personalized learning environment (no computers, though!), which I doubt had the kind of problems you are describing (granted, it's possible my 8 yo perspective just didn't catch them).
