Yes, the ticket vouchers from the base can be added to your MDE account, and the base purchased tickets will work with any active magic bands also connected to your MDE account. We have been using the same magic bands for years. Only thing with the base ticket vouchers is that when you get to Disney, you will need to go to guest relations at the park and have them activated before you can use them.
Pros/Cons is a personal preference, but I prefer the bands because they are easier to keep track of and I am not having to go into my wallet to pull out the card each time I need to scan in to either a park or when using a fast pass (
assuming Disney Genie+ will scan the same as the old fast pass, but haven't had personal experience yet).
And for those who have young (or older) children with them, stopped my having to ask "you got your tickets?" before we headed to the parks each day. I can look at their arms and see if they have their tickets with them