SAFD: I’ve only ever been to WDW, so my options are pretty limited. I really enjoy both Boo To You! And Festival of Fantasy. As I have been exclusively visiting MK during the evening in the last few years, either for MNSSHP or After Hours, it has been a while since I’ve been able to see Festival of Fantasy. It is the only thing I miss at Disney in my current “visit Disney parks as though you are a vampire” plan (although, I’ll definitely have to find some time for AK soon since night events generally don’t happen there).
As far as bringing back a parade, I vaguely remember waiting for the Teenage Murant Ninja Turtles at MGM Studios in the early-90s to drive by in some type of parade (and it being the only thing my little brother cared that we do on the whole trip). Honestly, there isn’t any specific parade I can even name that I’ve seen and would like to see again at Disney. I just think it would be cool to see some different parade-like offerings at the non-MK parks now that performers in the parks are getting a little closer to pre-pandemic numbers.