IDK, instinct says it feels like a bad idea. I mean, sure, why not unlock something account wide, but then again, what if you wanted the challenge of getting badge X on alt D in which it's More difficult based on inherent design differences. Like, IDK...a healing brute? Things like accolades and badges have encouraged people to have dedicated alts for these tasks causing them to be creative in their design choices, Bio's, etc. Some of the accolades even intentionally encourage teaming (pretty sure, no quoting!). IDK, I'd rather not TBH.