You're right that OF needs some balance changes. I'll address that in the next update to make it rewarding, but not too easy compared to the standard jobs.
I like the ideas about fans reacting badly to weight loss & being recognised if you become famous!
I'll include an option to change usernames in the next update. A big part of the next update will be improving immobility at home; there'll be a new group you can work for to earn special new home upgrades targeted at blob characters.