The MB are definitely faster, but we found the paper tickets in a lanyard old school were also a lot faster than the people fumbling with their phones for us last week.
Unfortunately they are really pushing toward digital, so it took some effort to get paper tickets- we had to go to City Hall after we entered the parks and ask for paper tickets. I guess the full sheet of paper we had printed our tickets on would have also worked, but talk about a pain to carry around/pull out to scan into stuff!!
if the MB+ were included with hotel stays or something, that would help get people to use them, but they are just so expensive for what you get at DL, especially for a once in a lifetime trip like ours was.