Mission Engineer should be account-wide
Well...
Thrill Seeker is an exploration badge in the AE building
Customizer takes seconds to get
Writer is account-wide
Ticket Master is account-wide if you don't claim 5000 tickets. Otherwise it takes just an arc or two to get
So really the only barrier to the accolade is Escapist, which doesn't take that long to earn.
http://www.fimfiction.net/story/36641/My-Little-Exalt
I think that once a character has unlocked the Mission Engineer accolade, it should be awarded account-wide. It's just so [censored] convenient, being without it really sucks once you're used to it. After all, we're not going to be testing our missions with only one character, and being able to fix an issue as soon as you encounter it is an unbelievable boon to MA productivity.
Issue 16 made me feel like this.
Warning: This poster likes to play Devil's Advocate.