S: Some names are disallowed but the reason is unclear. Would be good to get more detailed message for the reason.
Q: Tried creating Cell but it says you cannot use this name. Why?
S: I feel like these rules could be relaxed a bit.
S: Also this has been mentioned in other topics, but please allow multiple capital letters, dash, underscore and space in between words.
S: Allow duplicate character names and use some other identity for uniqueness. This has been now a trend in new games to require some unique family name or battle tag for tracking characters/accounts and allow character names to be repetitive. The release is only in March and even though this might be something naive to ask from a client perspective, I still think it might be reasonable (and thus worth trying to ask).